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Finding the Fourth Proportional to 398,737.92, 550,256.70 and 217,449.39

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Solution

The fourth proportional to 398,737.92, 550,256.70 and 217,449.39 is: 300,079.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,737.92 : 550,256.70 = 217,449.39 : x
  2. Step 2: Convert to fraction form
    398,737.92/550,256.70 = 217,449.39/x
  3. Step 3: Cross multiply
    398,737.92x = 550,256.70 × 217,449.39
  4. Step 4: Simplify right side
    398,737.92x = 119,652,983,758.41
  5. Step 5: Solve for x
    x = 119,652,983,758.41/398,737.92
  6. Step 6: Final answer
    x = 300,079.27

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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.