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Finding the Fourth Proportional to 1,514.82, 2,090.55 and 851.70

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Solution

The fourth proportional to 1,514.82, 2,090.55 and 851.70 is: 1,175.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,514.82 : 2,090.55 = 851.70 : x
  2. Step 2: Convert to fraction form
    1,514.82/2,090.55 = 851.70/x
  3. Step 3: Cross multiply
    1,514.82x = 2,090.55 × 851.70
  4. Step 4: Simplify right side
    1,514.82x = 1,780,521.44
  5. Step 5: Solve for x
    x = 1,780,521.44/1,514.82
  6. Step 6: Final answer
    x = 1,175.40

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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.