Home / 812,576.40-1,218,864.60-392,672.40

Finding the Fourth Proportional to 812,576.40, 1,218,864.60 and 392,672.40

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Solution

The fourth proportional to 812,576.40, 1,218,864.60 and 392,672.40 is: 589,008.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,576.40 : 1,218,864.60 = 392,672.40 : x
  2. Step 2: Convert to fraction form
    812,576.40/1,218,864.60 = 392,672.40/x
  3. Step 3: Cross multiply
    812,576.40x = 1,218,864.60 × 392,672.40
  4. Step 4: Simplify right side
    812,576.40x = 478,614,487,757.04
  5. Step 5: Solve for x
    x = 478,614,487,757.04/812,576.40
  6. Step 6: Final answer
    x = 589,008.60

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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.