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Finding the Fourth Proportional to 457,141.60, 685,712.40 and 389,490.40

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Solution

The fourth proportional to 457,141.60, 685,712.40 and 389,490.40 is: 584,235.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,141.60 : 685,712.40 = 389,490.40 : x
  2. Step 2: Convert to fraction form
    457,141.60/685,712.40 = 389,490.40/x
  3. Step 3: Cross multiply
    457,141.60x = 685,712.40 × 389,490.40
  4. Step 4: Simplify right side
    457,141.60x = 267,078,396,960.96
  5. Step 5: Solve for x
    x = 267,078,396,960.96/457,141.60
  6. Step 6: Final answer
    x = 584,235.60

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Similar ratio
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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.