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Finding the Fourth Proportional to 735.20, 1,098.60 and 528.80

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Solution

The fourth proportional to 735.20, 1,098.60 and 528.80 is: 790.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    735.20 : 1,098.60 = 528.80 : x
  2. Step 2: Convert to fraction form
    735.20/1,098.60 = 528.80/x
  3. Step 3: Cross multiply
    735.20x = 1,098.60 × 528.80
  4. Step 4: Simplify right side
    735.20x = 580,939.68
  5. Step 5: Solve for x
    x = 580,939.68/735.20
  6. Step 6: Final answer
    x = 790.18

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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.