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Finding the Fourth Proportional to 520,305.12, 780,446.70 and 239,822.37

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Solution

The fourth proportional to 520,305.12, 780,446.70 and 239,822.37 is: 359,728.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,305.12 : 780,446.70 = 239,822.37 : x
  2. Step 2: Convert to fraction form
    520,305.12/780,446.70 = 239,822.37/x
  3. Step 3: Cross multiply
    520,305.12x = 780,446.70 × 239,822.37
  4. Step 4: Simplify right side
    520,305.12x = 187,168,577,252.68
  5. Step 5: Solve for x
    x = 187,168,577,252.68/520,305.12
  6. Step 6: Final answer
    x = 359,728.49

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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.