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Finding the Fourth Proportional to 1,148.10, 1,720.32 and 531.48

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Solution

The fourth proportional to 1,148.10, 1,720.32 and 531.48 is: 796.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,148.10 : 1,720.32 = 531.48 : x
  2. Step 2: Convert to fraction form
    1,148.10/1,720.32 = 531.48/x
  3. Step 3: Cross multiply
    1,148.10x = 1,720.32 × 531.48
  4. Step 4: Simplify right side
    1,148.10x = 914,315.67
  5. Step 5: Solve for x
    x = 914,315.67/1,148.10
  6. Step 6: Final answer
    x = 796.37

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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.