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Finding the Fourth Proportional to 438,887.89, 658,264.56 and 139,329.64

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Solution

The fourth proportional to 438,887.89, 658,264.56 and 139,329.64 is: 208,973.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,887.89 : 658,264.56 = 139,329.64 : x
  2. Step 2: Convert to fraction form
    438,887.89/658,264.56 = 139,329.64/x
  3. Step 3: Cross multiply
    438,887.89x = 658,264.56 × 139,329.64
  4. Step 4: Simplify right side
    438,887.89x = 91,715,764,169.56
  5. Step 5: Solve for x
    x = 91,715,764,169.56/438,887.89
  6. Step 6: Final answer
    x = 208,973.10

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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.