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Finding the Fourth Proportional to 423,487.04, 635,294.34 and 123,930

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Solution

The fourth proportional to 423,487.04, 635,294.34 and 123,930 is: 185,913.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,487.04 : 635,294.34 = 123,930 : x
  2. Step 2: Convert to fraction form
    423,487.04/635,294.34 = 123,930/x
  3. Step 3: Cross multiply
    423,487.04x = 635,294.34 × 123,930
  4. Step 4: Simplify right side
    423,487.04x = 78,732,027,556.20
  5. Step 5: Solve for x
    x = 78,732,027,556.20/423,487.04
  6. Step 6: Final answer
    x = 185,913.67

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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.