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Finding the Fourth Proportional to 324,978.91, 487,173.11 and 147,389.04

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Solution

The fourth proportional to 324,978.91, 487,173.11 and 147,389.04 is: 220,949.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,978.91 : 487,173.11 = 147,389.04 : x
  2. Step 2: Convert to fraction form
    324,978.91/487,173.11 = 147,389.04/x
  3. Step 3: Cross multiply
    324,978.91x = 487,173.11 × 147,389.04
  4. Step 4: Simplify right side
    324,978.91x = 71,803,976,259.77
  5. Step 5: Solve for x
    x = 71,803,976,259.77/324,978.91
  6. Step 6: Final answer
    x = 220,949.65

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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.