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Finding the Fourth Proportional to 758.48, 1,138.56 and 528.36

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Solution

The fourth proportional to 758.48, 1,138.56 and 528.36 is: 793.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.48 : 1,138.56 = 528.36 : x
  2. Step 2: Convert to fraction form
    758.48/1,138.56 = 528.36/x
  3. Step 3: Cross multiply
    758.48x = 1,138.56 × 528.36
  4. Step 4: Simplify right side
    758.48x = 601,569.56
  5. Step 5: Solve for x
    x = 601,569.56/758.48
  6. Step 6: Final answer
    x = 793.13

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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.