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Finding the Fourth Proportional to 1,514.87, 2,090.36 and 851.71

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Solution

The fourth proportional to 1,514.87, 2,090.36 and 851.71 is: 1,175.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,514.87 : 2,090.36 = 851.71 : x
  2. Step 2: Convert to fraction form
    1,514.87/2,090.36 = 851.71/x
  3. Step 3: Cross multiply
    1,514.87x = 2,090.36 × 851.71
  4. Step 4: Simplify right side
    1,514.87x = 1,780,378.87
  5. Step 5: Solve for x
    x = 1,780,378.87/1,514.87
  6. Step 6: Final answer
    x = 1,175.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.