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Finding the Fourth Proportional to 487.25, 731.18 and 355.23

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Solution

The fourth proportional to 487.25, 731.18 and 355.23 is: 533.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.25 : 731.18 = 355.23 : x
  2. Step 2: Convert to fraction form
    487.25/731.18 = 355.23/x
  3. Step 3: Cross multiply
    487.25x = 731.18 × 355.23
  4. Step 4: Simplify right side
    487.25x = 259,739.37
  5. Step 5: Solve for x
    x = 259,739.37/487.25
  6. Step 6: Final answer
    x = 533.07

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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.