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Finding the Fourth Proportional to 643,373.40, 965,294.10 and 222,691.80

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Solution

The fourth proportional to 643,373.40, 965,294.10 and 222,691.80 is: 334,118.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,373.40 : 965,294.10 = 222,691.80 : x
  2. Step 2: Convert to fraction form
    643,373.40/965,294.10 = 222,691.80/x
  3. Step 3: Cross multiply
    643,373.40x = 965,294.10 × 222,691.80
  4. Step 4: Simplify right side
    643,373.40x = 214,963,080,658.38
  5. Step 5: Solve for x
    x = 214,963,080,658.38/643,373.40
  6. Step 6: Final answer
    x = 334,118.69

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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.