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Finding the Fourth Proportional to 744.59, 1,114.72 and 528.59

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Solution

The fourth proportional to 744.59, 1,114.72 and 528.59 is: 791.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.59 : 1,114.72 = 528.59 : x
  2. Step 2: Convert to fraction form
    744.59/1,114.72 = 528.59/x
  3. Step 3: Cross multiply
    744.59x = 1,114.72 × 528.59
  4. Step 4: Simplify right side
    744.59x = 589,229.84
  5. Step 5: Solve for x
    x = 589,229.84/744.59
  6. Step 6: Final answer
    x = 791.35

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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.