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Finding the Fourth Proportional to 399,057.32, 550,702.32 and 217,770.68

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Solution

The fourth proportional to 399,057.32, 550,702.32 and 217,770.68 is: 300,525.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,057.32 : 550,702.32 = 217,770.68 : x
  2. Step 2: Convert to fraction form
    399,057.32/550,702.32 = 217,770.68/x
  3. Step 3: Cross multiply
    399,057.32x = 550,702.32 × 217,770.68
  4. Step 4: Simplify right side
    399,057.32x = 119,926,818,703.98
  5. Step 5: Solve for x
    x = 119,926,818,703.98/399,057.32
  6. Step 6: Final answer
    x = 300,525.29

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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.