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Finding the Fourth Proportional to 403,936.10, 605,904.15 and 137,672.90

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Solution

The fourth proportional to 403,936.10, 605,904.15 and 137,672.90 is: 206,509.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,936.10 : 605,904.15 = 137,672.90 : x
  2. Step 2: Convert to fraction form
    403,936.10/605,904.15 = 137,672.90/x
  3. Step 3: Cross multiply
    403,936.10x = 605,904.15 × 137,672.90
  4. Step 4: Simplify right side
    403,936.10x = 83,416,581,452.54
  5. Step 5: Solve for x
    x = 83,416,581,452.54/403,936.10
  6. Step 6: Final answer
    x = 206,509.35

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Similar ratio
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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.