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Finding the Fourth Proportional to 457,682.40, 686,523.60 and 426,578.40

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Solution

The fourth proportional to 457,682.40, 686,523.60 and 426,578.40 is: 639,867.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,682.40 : 686,523.60 = 426,578.40 : x
  2. Step 2: Convert to fraction form
    457,682.40/686,523.60 = 426,578.40/x
  3. Step 3: Cross multiply
    457,682.40x = 686,523.60 × 426,578.40
  4. Step 4: Simplify right side
    457,682.40x = 292,856,138,850.24
  5. Step 5: Solve for x
    x = 292,856,138,850.24/457,682.40
  6. Step 6: Final answer
    x = 639,867.60

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Double scale
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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.