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Finding the Fourth Proportional to 455,426.60, 683,139.90 and 319,613.90

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Solution

The fourth proportional to 455,426.60, 683,139.90 and 319,613.90 is: 479,420.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,426.60 : 683,139.90 = 319,613.90 : x
  2. Step 2: Convert to fraction form
    455,426.60/683,139.90 = 319,613.90/x
  3. Step 3: Cross multiply
    455,426.60x = 683,139.90 × 319,613.90
  4. Step 4: Simplify right side
    455,426.60x = 218,341,007,684.61
  5. Step 5: Solve for x
    x = 218,341,007,684.61/455,426.60
  6. Step 6: Final answer
    x = 479,420.85

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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.