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Finding the Fourth Proportional to 576,752.40, 865,128.60 and 417,320.10

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Solution

The fourth proportional to 576,752.40, 865,128.60 and 417,320.10 is: 625,980.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    576,752.40 : 865,128.60 = 417,320.10 : x
  2. Step 2: Convert to fraction form
    576,752.40/865,128.60 = 417,320.10/x
  3. Step 3: Cross multiply
    576,752.40x = 865,128.60 × 417,320.10
  4. Step 4: Simplify right side
    576,752.40x = 361,035,553,864.86
  5. Step 5: Solve for x
    x = 361,035,553,864.86/576,752.40
  6. Step 6: Final answer
    x = 625,980.15

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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.