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Finding the Fourth Proportional to 403,881.71, 605,931.65 and 123,391.31

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Solution

The fourth proportional to 403,881.71, 605,931.65 and 123,391.31 is: 185,120.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,881.71 : 605,931.65 = 123,391.31 : x
  2. Step 2: Convert to fraction form
    403,881.71/605,931.65 = 123,391.31/x
  3. Step 3: Cross multiply
    403,881.71x = 605,931.65 × 123,391.31
  4. Step 4: Simplify right side
    403,881.71x = 74,766,699,447.01
  5. Step 5: Solve for x
    x = 74,766,699,447.01/403,881.71
  6. Step 6: Final answer
    x = 185,120.29

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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.