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Finding the Fourth Proportional to 412,837.40, 620,655.90 and 329,660.12

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Solution

The fourth proportional to 412,837.40, 620,655.90 and 329,660.12 is: 495,607.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,837.40 : 620,655.90 = 329,660.12 : x
  2. Step 2: Convert to fraction form
    412,837.40/620,655.90 = 329,660.12/x
  3. Step 3: Cross multiply
    412,837.40x = 620,655.90 × 329,660.12
  4. Step 4: Simplify right side
    412,837.40x = 204,605,498,472.71
  5. Step 5: Solve for x
    x = 204,605,498,472.71/412,837.40
  6. Step 6: Final answer
    x = 495,607.95

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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.