Home / 812,839.20-1,220,045.76-392,410.08

Finding the Fourth Proportional to 812,839.20, 1,220,045.76 and 392,410.08

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Solution

The fourth proportional to 812,839.20, 1,220,045.76 and 392,410.08 is: 588,995.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,839.20 : 1,220,045.76 = 392,410.08 : x
  2. Step 2: Convert to fraction form
    812,839.20/1,220,045.76 = 392,410.08/x
  3. Step 3: Cross multiply
    812,839.20x = 1,220,045.76 × 392,410.08
  4. Step 4: Simplify right side
    812,839.20x = 478,758,254,285.26
  5. Step 5: Solve for x
    x = 478,758,254,285.26/812,839.20
  6. Step 6: Final answer
    x = 588,995.04

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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.