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Finding the Fourth Proportional to 485,891.52, 670,525.80 and 268,102.20

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Solution

The fourth proportional to 485,891.52, 670,525.80 and 268,102.20 is: 369,978.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,891.52 : 670,525.80 = 268,102.20 : x
  2. Step 2: Convert to fraction form
    485,891.52/670,525.80 = 268,102.20/x
  3. Step 3: Cross multiply
    485,891.52x = 670,525.80 × 268,102.20
  4. Step 4: Simplify right side
    485,891.52x = 179,769,442,136.76
  5. Step 5: Solve for x
    x = 179,769,442,136.76/485,891.52
  6. Step 6: Final answer
    x = 369,978.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.