Home / 620,272,429.20-930,408,643.80-390,689,917.20

Finding the Fourth Proportional to 620,272,429.20, 930,408,643.80 and 390,689,917.20

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Solution

The fourth proportional to 620,272,429.20, 930,408,643.80 and 390,689,917.20 is: 586,034,875.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,272,429.20 : 930,408,643.80 = 390,689,917.20 : x
  2. Step 2: Convert to fraction form
    620,272,429.20/930,408,643.80 = 390,689,917.20/x
  3. Step 3: Cross multiply
    620,272,429.20x = 930,408,643.80 × 390,689,917.20
  4. Step 4: Simplify right side
    620,272,429.20x = 363,501,276,008,386,240
  5. Step 5: Solve for x
    x = 363,501,276,008,386,240/620,272,429.20
  6. Step 6: Final answer
    x = 586,034,875.80

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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.