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Finding the Fourth Proportional to 408,136.92, 612,211.56 and 155,431.40

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Solution

The fourth proportional to 408,136.92, 612,211.56 and 155,431.40 is: 233,149.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,136.92 : 612,211.56 = 155,431.40 : x
  2. Step 2: Convert to fraction form
    408,136.92/612,211.56 = 155,431.40/x
  3. Step 3: Cross multiply
    408,136.92x = 612,211.56 × 155,431.40
  4. Step 4: Simplify right side
    408,136.92x = 95,156,896,805.93
  5. Step 5: Solve for x
    x = 95,156,896,805.93/408,136.92
  6. Step 6: Final answer
    x = 233,149.45

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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.