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Finding the Fourth Proportional to 372.18, 554.38 and 358.80

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Solution

The fourth proportional to 372.18, 554.38 and 358.80 is: 534.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.18 : 554.38 = 358.80 : x
  2. Step 2: Convert to fraction form
    372.18/554.38 = 358.80/x
  3. Step 3: Cross multiply
    372.18x = 554.38 × 358.80
  4. Step 4: Simplify right side
    372.18x = 198,911.54
  5. Step 5: Solve for x
    x = 198,911.54/372.18
  6. Step 6: Final answer
    x = 534.45

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.