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Finding the Fourth Proportional to 438,761.47, 605,531.42 and 266,639.71

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Solution

The fourth proportional to 438,761.47, 605,531.42 and 266,639.71 is: 367,987.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,761.47 : 605,531.42 = 266,639.71 : x
  2. Step 2: Convert to fraction form
    438,761.47/605,531.42 = 266,639.71/x
  3. Step 3: Cross multiply
    438,761.47x = 605,531.42 × 266,639.71
  4. Step 4: Simplify right side
    438,761.47x = 161,458,722,224.69
  5. Step 5: Solve for x
    x = 161,458,722,224.69/438,761.47
  6. Step 6: Final answer
    x = 367,987.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.