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Finding the Fourth Proportional to 520,305.73, 780,446.40 and 239,822.98

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Solution

The fourth proportional to 520,305.73, 780,446.40 and 239,822.98 is: 359,728.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,305.73 : 780,446.40 = 239,822.98 : x
  2. Step 2: Convert to fraction form
    520,305.73/780,446.40 = 239,822.98/x
  3. Step 3: Cross multiply
    520,305.73x = 780,446.40 × 239,822.98
  4. Step 4: Simplify right side
    520,305.73x = 187,168,981,378.27
  5. Step 5: Solve for x
    x = 187,168,981,378.27/520,305.73
  6. Step 6: Final answer
    x = 359,728.85

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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.