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Finding the Fourth Proportional to 666,543.42, 999,918.78 and 217,159.68

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Solution

The fourth proportional to 666,543.42, 999,918.78 and 217,159.68 is: 325,773.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,543.42 : 999,918.78 = 217,159.68 : x
  2. Step 2: Convert to fraction form
    666,543.42/999,918.78 = 217,159.68/x
  3. Step 3: Cross multiply
    666,543.42x = 999,918.78 × 217,159.68
  4. Step 4: Simplify right side
    666,543.42x = 217,142,042,290.79
  5. Step 5: Solve for x
    x = 217,142,042,290.79/666,543.42
  6. Step 6: Final answer
    x = 325,773.29

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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.