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Finding the Fourth Proportional to 744.91, 1,115.75 and 711.07

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Solution

The fourth proportional to 744.91, 1,115.75 and 711.07 is: 1,065.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.91 : 1,115.75 = 711.07 : x
  2. Step 2: Convert to fraction form
    744.91/1,115.75 = 711.07/x
  3. Step 3: Cross multiply
    744.91x = 1,115.75 × 711.07
  4. Step 4: Simplify right side
    744.91x = 793,372.80
  5. Step 5: Solve for x
    x = 793,372.80/744.91
  6. Step 6: Final answer
    x = 1,065.06

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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.