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Finding the Fourth Proportional to 1,130.31, 1,693.85 and 744.75

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Solution

The fourth proportional to 1,130.31, 1,693.85 and 744.75 is: 1,116.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,130.31 : 1,693.85 = 744.75 : x
  2. Step 2: Convert to fraction form
    1,130.31/1,693.85 = 744.75/x
  3. Step 3: Cross multiply
    1,130.31x = 1,693.85 × 744.75
  4. Step 4: Simplify right side
    1,130.31x = 1,261,491.06
  5. Step 5: Solve for x
    x = 1,261,491.06/1,130.31
  6. Step 6: Final answer
    x = 1,116.06

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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.