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Finding the Fourth Proportional to 515,136.40, 772,704.60 and 488,892.40

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Solution

The fourth proportional to 515,136.40, 772,704.60 and 488,892.40 is: 733,338.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,136.40 : 772,704.60 = 488,892.40 : x
  2. Step 2: Convert to fraction form
    515,136.40/772,704.60 = 488,892.40/x
  3. Step 3: Cross multiply
    515,136.40x = 772,704.60 × 488,892.40
  4. Step 4: Simplify right side
    515,136.40x = 377,769,406,385.04
  5. Step 5: Solve for x
    x = 377,769,406,385.04/515,136.40
  6. Step 6: Final answer
    x = 733,338.60

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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.