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Finding the Fourth Proportional to 385,514.70, 532,251.78 and 247,749.50

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Solution

The fourth proportional to 385,514.70, 532,251.78 and 247,749.50 is: 342,049.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,514.70 : 532,251.78 = 247,749.50 : x
  2. Step 2: Convert to fraction form
    385,514.70/532,251.78 = 247,749.50/x
  3. Step 3: Cross multiply
    385,514.70x = 532,251.78 × 247,749.50
  4. Step 4: Simplify right side
    385,514.70x = 131,865,112,369.11
  5. Step 5: Solve for x
    x = 131,865,112,369.11/385,514.70
  6. Step 6: Final answer
    x = 342,049.51

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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.