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Finding the Fourth Proportional to 288,031.20, 431,917.20 and 110,479.20

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Solution

The fourth proportional to 288,031.20, 431,917.20 and 110,479.20 is: 165,669.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,031.20 : 431,917.20 = 110,479.20 : x
  2. Step 2: Convert to fraction form
    288,031.20/431,917.20 = 110,479.20/x
  3. Step 3: Cross multiply
    288,031.20x = 431,917.20 × 110,479.20
  4. Step 4: Simplify right side
    288,031.20x = 47,717,866,722.24
  5. Step 5: Solve for x
    x = 47,717,866,722.24/288,031.20
  6. Step 6: Final answer
    x = 165,669.09

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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.