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Finding the Fourth Proportional to 1,514.49, 2,089.79 and 842.24

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Solution

The fourth proportional to 1,514.49, 2,089.79 and 842.24 is: 1,162.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,514.49 : 2,089.79 = 842.24 : x
  2. Step 2: Convert to fraction form
    1,514.49/2,089.79 = 842.24/x
  3. Step 3: Cross multiply
    1,514.49x = 2,089.79 × 842.24
  4. Step 4: Simplify right side
    1,514.49x = 1,760,105.74
  5. Step 5: Solve for x
    x = 1,760,105.74/1,514.49
  6. Step 6: Final answer
    x = 1,162.18

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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.