Home / 457,815.60-686,723.40-390,164.40

Finding the Fourth Proportional to 457,815.60, 686,723.40 and 390,164.40

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Solution

The fourth proportional to 457,815.60, 686,723.40 and 390,164.40 is: 585,246.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,815.60 : 686,723.40 = 390,164.40 : x
  2. Step 2: Convert to fraction form
    457,815.60/686,723.40 = 390,164.40/x
  3. Step 3: Cross multiply
    457,815.60x = 686,723.40 × 390,164.40
  4. Step 4: Simplify right side
    457,815.60x = 267,935,023,326.96
  5. Step 5: Solve for x
    x = 267,935,023,326.96/457,815.60
  6. Step 6: Final answer
    x = 585,246.60

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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.