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Finding the Fourth Proportional to 577,869.80, 865,115.10 and 411,981.80

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Solution

The fourth proportional to 577,869.80, 865,115.10 and 411,981.80 is: 616,768.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,869.80 : 865,115.10 = 411,981.80 : x
  2. Step 2: Convert to fraction form
    577,869.80/865,115.10 = 411,981.80/x
  3. Step 3: Cross multiply
    577,869.80x = 865,115.10 × 411,981.80
  4. Step 4: Simplify right side
    577,869.80x = 356,411,676,105.18
  5. Step 5: Solve for x
    x = 356,411,676,105.18/577,869.80
  6. Step 6: Final answer
    x = 616,768.13

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1.5x scale

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.