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Finding the Fourth Proportional to 257,065.38, 385,616.43 and 79,549.56

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Solution

The fourth proportional to 257,065.38, 385,616.43 and 79,549.56 is: 119,330.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,065.38 : 385,616.43 = 79,549.56 : x
  2. Step 2: Convert to fraction form
    257,065.38/385,616.43 = 79,549.56/x
  3. Step 3: Cross multiply
    257,065.38x = 385,616.43 × 79,549.56
  4. Step 4: Simplify right side
    257,065.38x = 30,675,617,335.27
  5. Step 5: Solve for x
    x = 30,675,617,335.27/257,065.38
  6. Step 6: Final answer
    x = 119,330.02

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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.