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Finding the Fourth Proportional to 1,744.58, 2,613.76 and 921.01

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Solution

The fourth proportional to 1,744.58, 2,613.76 and 921.01 is: 1,379.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,744.58 : 2,613.76 = 921.01 : x
  2. Step 2: Convert to fraction form
    1,744.58/2,613.76 = 921.01/x
  3. Step 3: Cross multiply
    1,744.58x = 2,613.76 × 921.01
  4. Step 4: Simplify right side
    1,744.58x = 2,407,299.10
  5. Step 5: Solve for x
    x = 2,407,299.10/1,744.58
  6. Step 6: Final answer
    x = 1,379.87

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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.