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Finding the Fourth Proportional to 744.78, 1,111.34 and 675.66

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Solution

The fourth proportional to 744.78, 1,111.34 and 675.66 is: 1,008.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.78 : 1,111.34 = 675.66 : x
  2. Step 2: Convert to fraction form
    744.78/1,111.34 = 675.66/x
  3. Step 3: Cross multiply
    744.78x = 1,111.34 × 675.66
  4. Step 4: Simplify right side
    744.78x = 750,884.61
  5. Step 5: Solve for x
    x = 750,884.61/744.78
  6. Step 6: Final answer
    x = 1,008.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.