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Finding the Fourth Proportional to 744.70, 1,028.55 and 701.50

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Solution

The fourth proportional to 744.70, 1,028.55 and 701.50 is: 968.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.70 : 1,028.55 = 701.50 : x
  2. Step 2: Convert to fraction form
    744.70/1,028.55 = 701.50/x
  3. Step 3: Cross multiply
    744.70x = 1,028.55 × 701.50
  4. Step 4: Simplify right side
    744.70x = 721,527.83
  5. Step 5: Solve for x
    x = 721,527.83/744.70
  6. Step 6: Final answer
    x = 968.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.