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Finding the Fourth Proportional to 457,148.10, 685,722.15 and 389,496.90

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Solution

The fourth proportional to 457,148.10, 685,722.15 and 389,496.90 is: 584,245.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,148.10 : 685,722.15 = 389,496.90 : x
  2. Step 2: Convert to fraction form
    457,148.10/685,722.15 = 389,496.90/x
  3. Step 3: Cross multiply
    457,148.10x = 685,722.15 × 389,496.90
  4. Step 4: Simplify right side
    457,148.10x = 267,086,651,686.34
  5. Step 5: Solve for x
    x = 267,086,651,686.34/457,148.10
  6. Step 6: Final answer
    x = 584,245.35

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Similar ratio
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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.