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Finding the Fourth Proportional to 324,761.40, 487,215.90 and 147,319.20

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Solution

The fourth proportional to 324,761.40, 487,215.90 and 147,319.20 is: 221,012.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,761.40 : 487,215.90 = 147,319.20 : x
  2. Step 2: Convert to fraction form
    324,761.40/487,215.90 = 147,319.20/x
  3. Step 3: Cross multiply
    324,761.40x = 487,215.90 × 147,319.20
  4. Step 4: Simplify right side
    324,761.40x = 71,776,256,615.28
  5. Step 5: Solve for x
    x = 71,776,256,615.28/324,761.40
  6. Step 6: Final answer
    x = 221,012.28

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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.