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Finding the Fourth Proportional to 621,552.66, 932,329 and 411,141.40

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Solution

The fourth proportional to 621,552.66, 932,329 and 411,141.40 is: 616,712.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,552.66 : 932,329 = 411,141.40 : x
  2. Step 2: Convert to fraction form
    621,552.66/932,329 = 411,141.40/x
  3. Step 3: Cross multiply
    621,552.66x = 932,329 × 411,141.40
  4. Step 4: Simplify right side
    621,552.66x = 383,319,050,320.60
  5. Step 5: Solve for x
    x = 383,319,050,320.60/621,552.66
  6. Step 6: Final answer
    x = 616,712.11

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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.