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Finding the Fourth Proportional to 351,885.32, 527,820.56 and 85,647.32

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Solution

The fourth proportional to 351,885.32, 527,820.56 and 85,647.32 is: 128,469.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,885.32 : 527,820.56 = 85,647.32 : x
  2. Step 2: Convert to fraction form
    351,885.32/527,820.56 = 85,647.32/x
  3. Step 3: Cross multiply
    351,885.32x = 527,820.56 × 85,647.32
  4. Step 4: Simplify right side
    351,885.32x = 45,206,416,404.90
  5. Step 5: Solve for x
    x = 45,206,416,404.90/351,885.32
  6. Step 6: Final answer
    x = 128,469.17

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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.