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Finding the Fourth Proportional to 720,517.72, 1,080,894.03 and 221,881.72

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Solution

The fourth proportional to 720,517.72, 1,080,894.03 and 221,881.72 is: 332,858.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,517.72 : 1,080,894.03 = 221,881.72 : x
  2. Step 2: Convert to fraction form
    720,517.72/1,080,894.03 = 221,881.72/x
  3. Step 3: Cross multiply
    720,517.72x = 1,080,894.03 × 221,881.72
  4. Step 4: Simplify right side
    720,517.72x = 239,830,626,514.13
  5. Step 5: Solve for x
    x = 239,830,626,514.13/720,517.72
  6. Step 6: Final answer
    x = 332,858.75

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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.