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Finding the Fourth Proportional to 399,483.56, 551,287.28 and 218,195.91

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Solution

The fourth proportional to 399,483.56, 551,287.28 and 218,195.91 is: 301,110.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,483.56 : 551,287.28 = 218,195.91 : x
  2. Step 2: Convert to fraction form
    399,483.56/551,287.28 = 218,195.91/x
  3. Step 3: Cross multiply
    399,483.56x = 551,287.28 × 218,195.91
  4. Step 4: Simplify right side
    399,483.56x = 120,288,630,276.52
  5. Step 5: Solve for x
    x = 120,288,630,276.52/399,483.56
  6. Step 6: Final answer
    x = 301,110.34

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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.