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Finding the Fourth Proportional to 324,978.20, 487,287.16 and 132,987.48

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Solution

The fourth proportional to 324,978.20, 487,287.16 and 132,987.48 is: 199,407.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,978.20 : 487,287.16 = 132,987.48 : x
  2. Step 2: Convert to fraction form
    324,978.20/487,287.16 = 132,987.48/x
  3. Step 3: Cross multiply
    324,978.20x = 487,287.16 × 132,987.48
  4. Step 4: Simplify right side
    324,978.20x = 64,803,091,444.76
  5. Step 5: Solve for x
    x = 64,803,091,444.76/324,978.20
  6. Step 6: Final answer
    x = 199,407.50

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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.