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Finding the Fourth Proportional to 804,672.60, 1,207,008.90 and 431,424.60

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Solution

The fourth proportional to 804,672.60, 1,207,008.90 and 431,424.60 is: 647,136.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    804,672.60 : 1,207,008.90 = 431,424.60 : x
  2. Step 2: Convert to fraction form
    804,672.60/1,207,008.90 = 431,424.60/x
  3. Step 3: Cross multiply
    804,672.60x = 1,207,008.90 × 431,424.60
  4. Step 4: Simplify right side
    804,672.60x = 520,733,331,878.94
  5. Step 5: Solve for x
    x = 520,733,331,878.94/804,672.60
  6. Step 6: Final answer
    x = 647,136.90

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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.