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Finding the Fourth Proportional to 1,011.01, 1,514.89 and 913.81

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Solution

The fourth proportional to 1,011.01, 1,514.89 and 913.81 is: 1,369.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011.01 : 1,514.89 = 913.81 : x
  2. Step 2: Convert to fraction form
    1,011.01/1,514.89 = 913.81/x
  3. Step 3: Cross multiply
    1,011.01x = 1,514.89 × 913.81
  4. Step 4: Simplify right side
    1,011.01x = 1,384,321.63
  5. Step 5: Solve for x
    x = 1,384,321.63/1,011.01
  6. Step 6: Final answer
    x = 1,369.25

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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.