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Finding the Fourth Proportional to 372, 557.28 and 356.16

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Solution

The fourth proportional to 372, 557.28 and 356.16 is: 533.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    372 : 557.28 = 356.16 : x
  2. Step 2: Convert to fraction form
    372/557.28 = 356.16/x
  3. Step 3: Cross multiply
    372x = 557.28 × 356.16
  4. Step 4: Simplify right side
    372x = 198,480.84
  5. Step 5: Solve for x
    x = 198,480.84/372
  6. Step 6: Final answer
    x = 533.55

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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.