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Finding the Fourth Proportional to 438,890.84, 658,269 and 139,332.60

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Solution

The fourth proportional to 438,890.84, 658,269 and 139,332.60 is: 208,977.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,890.84 : 658,269 = 139,332.60 : x
  2. Step 2: Convert to fraction form
    438,890.84/658,269 = 139,332.60/x
  3. Step 3: Cross multiply
    438,890.84x = 658,269 × 139,332.60
  4. Step 4: Simplify right side
    438,890.84x = 91,718,331,269.40
  5. Step 5: Solve for x
    x = 91,718,331,269.40/438,890.84
  6. Step 6: Final answer
    x = 208,977.55

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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.