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Finding the Fourth Proportional to 385,791.15, 532,400.33 and 220,215.71

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Solution

The fourth proportional to 385,791.15, 532,400.33 and 220,215.71 is: 303,902.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,791.15 : 532,400.33 = 220,215.71 : x
  2. Step 2: Convert to fraction form
    385,791.15/532,400.33 = 220,215.71/x
  3. Step 3: Cross multiply
    385,791.15x = 532,400.33 × 220,215.71
  4. Step 4: Simplify right side
    385,791.15x = 117,242,912,912.10
  5. Step 5: Solve for x
    x = 117,242,912,912.10/385,791.15
  6. Step 6: Final answer
    x = 303,902.55

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1.5x scale

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.