Home / 515,038.20-772,557.30-215,419.20

Finding the Fourth Proportional to 515,038.20, 772,557.30 and 215,419.20

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Solution

The fourth proportional to 515,038.20, 772,557.30 and 215,419.20 is: 323,128.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,038.20 : 772,557.30 = 215,419.20 : x
  2. Step 2: Convert to fraction form
    515,038.20/772,557.30 = 215,419.20/x
  3. Step 3: Cross multiply
    515,038.20x = 772,557.30 × 215,419.20
  4. Step 4: Simplify right side
    515,038.20x = 166,423,675,520.16
  5. Step 5: Solve for x
    x = 166,423,675,520.16/515,038.20
  6. Step 6: Final answer
    x = 323,128.80

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Similar ratio
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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.