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Finding the Fourth Proportional to 356.24, 487.66 and 345.18

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Solution

The fourth proportional to 356.24, 487.66 and 345.18 is: 472.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.24 : 487.66 = 345.18 : x
  2. Step 2: Convert to fraction form
    356.24/487.66 = 345.18/x
  3. Step 3: Cross multiply
    356.24x = 487.66 × 345.18
  4. Step 4: Simplify right side
    356.24x = 168,330.48
  5. Step 5: Solve for x
    x = 168,330.48/356.24
  6. Step 6: Final answer
    x = 472.52

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.