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Finding the Fourth Proportional to 372.32, 555.21 and 321.32

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Solution

The fourth proportional to 372.32, 555.21 and 321.32 is: 479.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.32 : 555.21 = 321.32 : x
  2. Step 2: Convert to fraction form
    372.32/555.21 = 321.32/x
  3. Step 3: Cross multiply
    372.32x = 555.21 × 321.32
  4. Step 4: Simplify right side
    372.32x = 178,400.08
  5. Step 5: Solve for x
    x = 178,400.08/372.32
  6. Step 6: Final answer
    x = 479.16

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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.