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Finding the Fourth Proportional to 372.72, 555.36 and 356.16

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Solution

The fourth proportional to 372.72, 555.36 and 356.16 is: 530.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.72 : 555.36 = 356.16 : x
  2. Step 2: Convert to fraction form
    372.72/555.36 = 356.16/x
  3. Step 3: Cross multiply
    372.72x = 555.36 × 356.16
  4. Step 4: Simplify right side
    372.72x = 197,797.02
  5. Step 5: Solve for x
    x = 197,797.02/372.72
  6. Step 6: Final answer
    x = 530.69

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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.