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Finding the Fourth Proportional to 421,373.25, 632,059.88 and 140,897.79

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Solution

The fourth proportional to 421,373.25, 632,059.88 and 140,897.79 is: 211,346.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,373.25 : 632,059.88 = 140,897.79 : x
  2. Step 2: Convert to fraction form
    421,373.25/632,059.88 = 140,897.79/x
  3. Step 3: Cross multiply
    421,373.25x = 632,059.88 × 140,897.79
  4. Step 4: Simplify right side
    421,373.25x = 89,055,839,535.18
  5. Step 5: Solve for x
    x = 89,055,839,535.18/421,373.25
  6. Step 6: Final answer
    x = 211,346.69

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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.