Home / 620,272,324.20-930,408,486.30-390,689,812.20

Finding the Fourth Proportional to 620,272,324.20, 930,408,486.30 and 390,689,812.20

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Solution

The fourth proportional to 620,272,324.20, 930,408,486.30 and 390,689,812.20 is: 586,034,718.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,272,324.20 : 930,408,486.30 = 390,689,812.20 : x
  2. Step 2: Convert to fraction form
    620,272,324.20/930,408,486.30 = 390,689,812.20/x
  3. Step 3: Cross multiply
    620,272,324.20x = 930,408,486.30 × 390,689,812.20
  4. Step 4: Simplify right side
    620,272,324.20x = 363,501,116,781,833,216
  5. Step 5: Solve for x
    x = 363,501,116,781,833,216/620,272,324.20
  6. Step 6: Final answer
    x = 586,034,718.30

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.