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Finding the Fourth Proportional to 399,610.80, 551,463.30 and 218,325.74

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Solution

The fourth proportional to 399,610.80, 551,463.30 and 218,325.74 is: 301,289.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,610.80 : 551,463.30 = 218,325.74 : x
  2. Step 2: Convert to fraction form
    399,610.80/551,463.30 = 218,325.74/x
  3. Step 3: Cross multiply
    399,610.80x = 551,463.30 × 218,325.74
  4. Step 4: Simplify right side
    399,610.80x = 120,398,633,055.34
  5. Step 5: Solve for x
    x = 120,398,633,055.34/399,610.80
  6. Step 6: Final answer
    x = 301,289.74

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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.