Home / 812,840.20-1,220,047.26-392,411.08

Finding the Fourth Proportional to 812,840.20, 1,220,047.26 and 392,411.08

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Solution

The fourth proportional to 812,840.20, 1,220,047.26 and 392,411.08 is: 588,996.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,840.20 : 1,220,047.26 = 392,411.08 : x
  2. Step 2: Convert to fraction form
    812,840.20/1,220,047.26 = 392,411.08/x
  3. Step 3: Cross multiply
    812,840.20x = 1,220,047.26 × 392,411.08
  4. Step 4: Simplify right side
    812,840.20x = 478,760,062,947.64
  5. Step 5: Solve for x
    x = 478,760,062,947.64/812,840.20
  6. Step 6: Final answer
    x = 588,996.54

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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.