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Finding the Fourth Proportional to 577,036.80, 865,399.68 and 391,190.40

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Solution

The fourth proportional to 577,036.80, 865,399.68 and 391,190.40 is: 586,680.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,036.80 : 865,399.68 = 391,190.40 : x
  2. Step 2: Convert to fraction form
    577,036.80/865,399.68 = 391,190.40/x
  3. Step 3: Cross multiply
    577,036.80x = 865,399.68 × 391,190.40
  4. Step 4: Simplify right side
    577,036.80x = 338,536,046,979.07
  5. Step 5: Solve for x
    x = 338,536,046,979.07/577,036.80
  6. Step 6: Final answer
    x = 586,680.17

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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.