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Finding the Fourth Proportional to 755.06, 1,130.76 and 668.49

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Solution

The fourth proportional to 755.06, 1,130.76 and 668.49 is: 1,001.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.06 : 1,130.76 = 668.49 : x
  2. Step 2: Convert to fraction form
    755.06/1,130.76 = 668.49/x
  3. Step 3: Cross multiply
    755.06x = 1,130.76 × 668.49
  4. Step 4: Simplify right side
    755.06x = 755,901.75
  5. Step 5: Solve for x
    x = 755,901.75/755.06
  6. Step 6: Final answer
    x = 1,001.11

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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.