Home / 431,921.60-648,206.40-221,451.20

Finding the Fourth Proportional to 431,921.60, 648,206.40 and 221,451.20

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Solution

The fourth proportional to 431,921.60, 648,206.40 and 221,451.20 is: 332,342.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,921.60 : 648,206.40 = 221,451.20 : x
  2. Step 2: Convert to fraction form
    431,921.60/648,206.40 = 221,451.20/x
  3. Step 3: Cross multiply
    431,921.60x = 648,206.40 × 221,451.20
  4. Step 4: Simplify right side
    431,921.60x = 143,546,085,127.68
  5. Step 5: Solve for x
    x = 143,546,085,127.68/431,921.60
  6. Step 6: Final answer
    x = 332,342.92

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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.