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Finding the Fourth Proportional to 408,737.84, 613,132.68 and 128,266.16

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Solution

The fourth proportional to 408,737.84, 613,132.68 and 128,266.16 is: 192,407.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,737.84 : 613,132.68 = 128,266.16 : x
  2. Step 2: Convert to fraction form
    408,737.84/613,132.68 = 128,266.16/x
  3. Step 3: Cross multiply
    408,737.84x = 613,132.68 × 128,266.16
  4. Step 4: Simplify right side
    408,737.84x = 78,644,174,434.11
  5. Step 5: Solve for x
    x = 78,644,174,434.11/408,737.84
  6. Step 6: Final answer
    x = 192,407.37

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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.