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Finding the Fourth Proportional to 520,602.20, 780,895.10 and 379,343.87

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Solution

The fourth proportional to 520,602.20, 780,895.10 and 379,343.87 is: 569,009.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,602.20 : 780,895.10 = 379,343.87 : x
  2. Step 2: Convert to fraction form
    520,602.20/780,895.10 = 379,343.87/x
  3. Step 3: Cross multiply
    520,602.20x = 780,895.10 × 379,343.87
  4. Step 4: Simplify right side
    520,602.20x = 296,227,769,034.78
  5. Step 5: Solve for x
    x = 296,227,769,034.78/520,602.20
  6. Step 6: Final answer
    x = 569,009.83

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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.