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Finding the Fourth Proportional to 1,011.59, 1,514.77 and 663.90

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Solution

The fourth proportional to 1,011.59, 1,514.77 and 663.90 is: 994.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011.59 : 1,514.77 = 663.90 : x
  2. Step 2: Convert to fraction form
    1,011.59/1,514.77 = 663.90/x
  3. Step 3: Cross multiply
    1,011.59x = 1,514.77 × 663.90
  4. Step 4: Simplify right side
    1,011.59x = 1,005,648.46
  5. Step 5: Solve for x
    x = 1,005,648.46/1,011.59
  6. Step 6: Final answer
    x = 994.13

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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.