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Finding the Fourth Proportional to 454,312.60, 681,468.90 and 420,098.20

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Solution

The fourth proportional to 454,312.60, 681,468.90 and 420,098.20 is: 630,147.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    454,312.60 : 681,468.90 = 420,098.20 : x
  2. Step 2: Convert to fraction form
    454,312.60/681,468.90 = 420,098.20/x
  3. Step 3: Cross multiply
    454,312.60x = 681,468.90 × 420,098.20
  4. Step 4: Simplify right side
    454,312.60x = 286,283,858,245.98
  5. Step 5: Solve for x
    x = 286,283,858,245.98/454,312.60
  6. Step 6: Final answer
    x = 630,147.30

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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.