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Finding the Fourth Proportional to 298,488.42, 447,754.67 and 85,274.38

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Solution

The fourth proportional to 298,488.42, 447,754.67 and 85,274.38 is: 127,917.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,488.42 : 447,754.67 = 85,274.38 : x
  2. Step 2: Convert to fraction form
    298,488.42/447,754.67 = 85,274.38/x
  3. Step 3: Cross multiply
    298,488.42x = 447,754.67 × 85,274.38
  4. Step 4: Simplify right side
    298,488.42x = 38,182,002,329.46
  5. Step 5: Solve for x
    x = 38,182,002,329.46/298,488.42
  6. Step 6: Final answer
    x = 127,917.87

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1.5x scale

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.