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Finding the Fourth Proportional to 520,405.60, 780,755.28 and 146,431.84

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Solution

The fourth proportional to 520,405.60, 780,755.28 and 146,431.84 is: 219,689.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,405.60 : 780,755.28 = 146,431.84 : x
  2. Step 2: Convert to fraction form
    520,405.60/780,755.28 = 146,431.84/x
  3. Step 3: Cross multiply
    520,405.60x = 780,755.28 × 146,431.84
  4. Step 4: Simplify right side
    520,405.60x = 114,327,432,240.12
  5. Step 5: Solve for x
    x = 114,327,432,240.12/520,405.60
  6. Step 6: Final answer
    x = 219,689.09

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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.