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Finding the Fourth Proportional to 403,728.60, 605,592.90 and 137,400.60

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Solution

The fourth proportional to 403,728.60, 605,592.90 and 137,400.60 is: 206,100.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,728.60 : 605,592.90 = 137,400.60 : x
  2. Step 2: Convert to fraction form
    403,728.60/605,592.90 = 137,400.60/x
  3. Step 3: Cross multiply
    403,728.60x = 605,592.90 × 137,400.60
  4. Step 4: Simplify right side
    403,728.60x = 83,208,827,815.74
  5. Step 5: Solve for x
    x = 83,208,827,815.74/403,728.60
  6. Step 6: Final answer
    x = 206,100.90

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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.