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Finding the Fourth Proportional to 438,959.88, 658,371.12 and 139,401.02

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Solution

The fourth proportional to 438,959.88, 658,371.12 and 139,401.02 is: 209,079.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,959.88 : 658,371.12 = 139,401.02 : x
  2. Step 2: Convert to fraction form
    438,959.88/658,371.12 = 139,401.02/x
  3. Step 3: Cross multiply
    438,959.88x = 658,371.12 × 139,401.02
  4. Step 4: Simplify right side
    438,959.88x = 91,777,602,374.69
  5. Step 5: Solve for x
    x = 91,777,602,374.69/438,959.88
  6. Step 6: Final answer
    x = 209,079.71

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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.