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Finding the Fourth Proportional to 520,981.68, 781,535.80 and 147,004.72

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Solution

The fourth proportional to 520,981.68, 781,535.80 and 147,004.72 is: 220,524.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,981.68 : 781,535.80 = 147,004.72 : x
  2. Step 2: Convert to fraction form
    520,981.68/781,535.80 = 147,004.72/x
  3. Step 3: Cross multiply
    520,981.68x = 781,535.80 × 147,004.72
  4. Step 4: Simplify right side
    520,981.68x = 114,889,451,448.98
  5. Step 5: Solve for x
    x = 114,889,451,448.98/520,981.68
  6. Step 6: Final answer
    x = 220,524.94

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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.