Home / 813,612.60-1,220,613.30-392,542.20

Finding the Fourth Proportional to 813,612.60, 1,220,613.30 and 392,542.20

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Solution

The fourth proportional to 813,612.60, 1,220,613.30 and 392,542.20 is: 588,907.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,612.60 : 1,220,613.30 = 392,542.20 : x
  2. Step 2: Convert to fraction form
    813,612.60/1,220,613.30 = 392,542.20/x
  3. Step 3: Cross multiply
    813,612.60x = 1,220,613.30 × 392,542.20
  4. Step 4: Simplify right side
    813,612.60x = 479,142,230,131.26
  5. Step 5: Solve for x
    x = 479,142,230,131.26/813,612.60
  6. Step 6: Final answer
    x = 588,907.09

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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.