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Finding the Fourth Proportional to 520,081.10, 780,121.65 and 240,145.10

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Solution

The fourth proportional to 520,081.10, 780,121.65 and 240,145.10 is: 360,217.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,081.10 : 780,121.65 = 240,145.10 : x
  2. Step 2: Convert to fraction form
    520,081.10/780,121.65 = 240,145.10/x
  3. Step 3: Cross multiply
    520,081.10x = 780,121.65 × 240,145.10
  4. Step 4: Simplify right side
    520,081.10x = 187,342,391,651.42
  5. Step 5: Solve for x
    x = 187,342,391,651.42/520,081.10
  6. Step 6: Final answer
    x = 360,217.65

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Similar ratio
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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.