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Finding the Fourth Proportional to 438,833.45, 658,272.96 and 139,337.48

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Solution

The fourth proportional to 438,833.45, 658,272.96 and 139,337.48 is: 209,013.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,833.45 : 658,272.96 = 139,337.48 : x
  2. Step 2: Convert to fraction form
    438,833.45/658,272.96 = 139,337.48/x
  3. Step 3: Cross multiply
    438,833.45x = 658,272.96 × 139,337.48
  4. Step 4: Simplify right side
    438,833.45x = 91,722,095,398.54
  5. Step 5: Solve for x
    x = 91,722,095,398.54/438,833.45
  6. Step 6: Final answer
    x = 209,013.45

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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.