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Finding the Fourth Proportional to 485,087.10, 727,630.65 and 477,213.90

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Solution

The fourth proportional to 485,087.10, 727,630.65 and 477,213.90 is: 715,820.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,087.10 : 727,630.65 = 477,213.90 : x
  2. Step 2: Convert to fraction form
    485,087.10/727,630.65 = 477,213.90/x
  3. Step 3: Cross multiply
    485,087.10x = 727,630.65 × 477,213.90
  4. Step 4: Simplify right side
    485,087.10x = 347,235,460,246.04
  5. Step 5: Solve for x
    x = 347,235,460,246.04/485,087.10
  6. Step 6: Final answer
    x = 715,820.85

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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.