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Finding the Fourth Proportional to 387,353.56, 580,899.54 and 147,410.44

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Solution

The fourth proportional to 387,353.56, 580,899.54 and 147,410.44 is: 221,065.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,353.56 : 580,899.54 = 147,410.44 : x
  2. Step 2: Convert to fraction form
    387,353.56/580,899.54 = 147,410.44/x
  3. Step 3: Cross multiply
    387,353.56x = 580,899.54 × 147,410.44
  4. Step 4: Simplify right side
    387,353.56x = 85,630,656,787.20
  5. Step 5: Solve for x
    x = 85,630,656,787.20/387,353.56
  6. Step 6: Final answer
    x = 221,065.88

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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.