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Finding the Fourth Proportional to 662.48, 913.40 and 531.28

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Solution

The fourth proportional to 662.48, 913.40 and 531.28 is: 732.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.48 : 913.40 = 531.28 : x
  2. Step 2: Convert to fraction form
    662.48/913.40 = 531.28/x
  3. Step 3: Cross multiply
    662.48x = 913.40 × 531.28
  4. Step 4: Simplify right side
    662.48x = 485,271.15
  5. Step 5: Solve for x
    x = 485,271.15/662.48
  6. Step 6: Final answer
    x = 732.51

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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.