Home / 714,422.81-985,916.21-392,162.90

Finding the Fourth Proportional to 714,422.81, 985,916.21 and 392,162.90

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Solution

The fourth proportional to 714,422.81, 985,916.21 and 392,162.90 is: 541,191.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,422.81 : 985,916.21 = 392,162.90 : x
  2. Step 2: Convert to fraction form
    714,422.81/985,916.21 = 392,162.90/x
  3. Step 3: Cross multiply
    714,422.81x = 985,916.21 × 392,162.90
  4. Step 4: Simplify right side
    714,422.81x = 386,639,753,180.21
  5. Step 5: Solve for x
    x = 386,639,753,180.21/714,422.81
  6. Step 6: Final answer
    x = 541,191.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.