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Finding the Fourth Proportional to 402,289.20, 603,514.80 and 117,979.20

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Solution

The fourth proportional to 402,289.20, 603,514.80 and 117,979.20 is: 176,992.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,289.20 : 603,514.80 = 117,979.20 : x
  2. Step 2: Convert to fraction form
    402,289.20/603,514.80 = 117,979.20/x
  3. Step 3: Cross multiply
    402,289.20x = 603,514.80 × 117,979.20
  4. Step 4: Simplify right side
    402,289.20x = 71,202,193,292.16
  5. Step 5: Solve for x
    x = 71,202,193,292.16/402,289.20
  6. Step 6: Final answer
    x = 176,992.55

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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.