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Finding the Fourth Proportional to 520,776.61, 781,159.34 and 395,188.13

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Solution

The fourth proportional to 520,776.61, 781,159.34 and 395,188.13 is: 592,777.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,776.61 : 781,159.34 = 395,188.13 : x
  2. Step 2: Convert to fraction form
    520,776.61/781,159.34 = 395,188.13/x
  3. Step 3: Cross multiply
    520,776.61x = 781,159.34 × 395,188.13
  4. Step 4: Simplify right side
    520,776.61x = 308,704,901,747.50
  5. Step 5: Solve for x
    x = 308,704,901,747.50/520,776.61
  6. Step 6: Final answer
    x = 592,777.97

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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.