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Finding the Fourth Proportional to 272,451.60, 408,628.80 and 172,432.80

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Solution

The fourth proportional to 272,451.60, 408,628.80 and 172,432.80 is: 258,618.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,451.60 : 408,628.80 = 172,432.80 : x
  2. Step 2: Convert to fraction form
    272,451.60/408,628.80 = 172,432.80/x
  3. Step 3: Cross multiply
    272,451.60x = 408,628.80 × 172,432.80
  4. Step 4: Simplify right side
    272,451.60x = 70,461,008,144.64
  5. Step 5: Solve for x
    x = 70,461,008,144.64/272,451.60
  6. Step 6: Final answer
    x = 258,618.44

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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.