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Finding the Fourth Proportional to 521,934.78, 720,616.92 and 400,859.70

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Solution

The fourth proportional to 521,934.78, 720,616.92 and 400,859.70 is: 553,452.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,934.78 : 720,616.92 = 400,859.70 : x
  2. Step 2: Convert to fraction form
    521,934.78/720,616.92 = 400,859.70/x
  3. Step 3: Cross multiply
    521,934.78x = 720,616.92 × 400,859.70
  4. Step 4: Simplify right side
    521,934.78x = 288,866,282,366.12
  5. Step 5: Solve for x
    x = 288,866,282,366.12/521,934.78
  6. Step 6: Final answer
    x = 553,452.83

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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.