Home / 812,965.60-1,218,136.20-512,909.20

Finding the Fourth Proportional to 812,965.60, 1,218,136.20 and 512,909.20

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Solution

The fourth proportional to 812,965.60, 1,218,136.20 and 512,909.20 is: 768,535.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,965.60 : 1,218,136.20 = 512,909.20 : x
  2. Step 2: Convert to fraction form
    812,965.60/1,218,136.20 = 512,909.20/x
  3. Step 3: Cross multiply
    812,965.60x = 1,218,136.20 × 512,909.20
  4. Step 4: Simplify right side
    812,965.60x = 624,793,263,833.04
  5. Step 5: Solve for x
    x = 624,793,263,833.04/812,965.60
  6. Step 6: Final answer
    x = 768,535.92

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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.