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Finding the Fourth Proportional to 3,175.20, 4,763.10 and 866.70

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Solution

The fourth proportional to 3,175.20, 4,763.10 and 866.70 is: 1,300.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,175.20 : 4,763.10 = 866.70 : x
  2. Step 2: Convert to fraction form
    3,175.20/4,763.10 = 866.70/x
  3. Step 3: Cross multiply
    3,175.20x = 4,763.10 × 866.70
  4. Step 4: Simplify right side
    3,175.20x = 4,128,178.77
  5. Step 5: Solve for x
    x = 4,128,178.77/3,175.20
  6. Step 6: Final answer
    x = 1,300.13

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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.