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Finding the Fourth Proportional to 521,959.17, 720,269.55 and 307,057.71

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Solution

The fourth proportional to 521,959.17, 720,269.55 and 307,057.71 is: 423,719.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,959.17 : 720,269.55 = 307,057.71 : x
  2. Step 2: Convert to fraction form
    521,959.17/720,269.55 = 307,057.71/x
  3. Step 3: Cross multiply
    521,959.17x = 720,269.55 × 307,057.71
  4. Step 4: Simplify right side
    521,959.17x = 221,164,318,605.73
  5. Step 5: Solve for x
    x = 221,164,318,605.73/521,959.17
  6. Step 6: Final answer
    x = 423,719.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.