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Finding the Fourth Proportional to 440,405.20, 660,478.20 and 124,889.68

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Solution

The fourth proportional to 440,405.20, 660,478.20 and 124,889.68 is: 187,297.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,405.20 : 660,478.20 = 124,889.68 : x
  2. Step 2: Convert to fraction form
    440,405.20/660,478.20 = 124,889.68/x
  3. Step 3: Cross multiply
    440,405.20x = 660,478.20 × 124,889.68
  4. Step 4: Simplify right side
    440,405.20x = 82,486,911,044.98
  5. Step 5: Solve for x
    x = 82,486,911,044.98/440,405.20
  6. Step 6: Final answer
    x = 187,297.77

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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.