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Finding the Fourth Proportional to 440,390.48, 660,760.76 and 140,917.20

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Solution

The fourth proportional to 440,390.48, 660,760.76 and 140,917.20 is: 211,431.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,390.48 : 660,760.76 = 140,917.20 : x
  2. Step 2: Convert to fraction form
    440,390.48/660,760.76 = 140,917.20/x
  3. Step 3: Cross multiply
    440,390.48x = 660,760.76 × 140,917.20
  4. Step 4: Simplify right side
    440,390.48x = 93,112,556,169.07
  5. Step 5: Solve for x
    x = 93,112,556,169.07/440,390.48
  6. Step 6: Final answer
    x = 211,431.81

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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.