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Finding the Fourth Proportional to 399,348.27, 551,113.50 and 218,069.67

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Solution

The fourth proportional to 399,348.27, 551,113.50 and 218,069.67 is: 300,943.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,348.27 : 551,113.50 = 218,069.67 : x
  2. Step 2: Convert to fraction form
    399,348.27/551,113.50 = 218,069.67/x
  3. Step 3: Cross multiply
    399,348.27x = 551,113.50 × 218,069.67
  4. Step 4: Simplify right side
    399,348.27x = 120,181,139,077.55
  5. Step 5: Solve for x
    x = 120,181,139,077.55/399,348.27
  6. Step 6: Final answer
    x = 300,943.18

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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.