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Finding the Fourth Proportional to 1,500.85, 2,249.65 and 769.42

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Solution

The fourth proportional to 1,500.85, 2,249.65 and 769.42 is: 1,153.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,500.85 : 2,249.65 = 769.42 : x
  2. Step 2: Convert to fraction form
    1,500.85/2,249.65 = 769.42/x
  3. Step 3: Cross multiply
    1,500.85x = 2,249.65 × 769.42
  4. Step 4: Simplify right side
    1,500.85x = 1,730,925.70
  5. Step 5: Solve for x
    x = 1,730,925.70/1,500.85
  6. Step 6: Final answer
    x = 1,153.30

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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.