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Finding the Fourth Proportional to 372.30, 513.32 and 322.40

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Solution

The fourth proportional to 372.30, 513.32 and 322.40 is: 444.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.30 : 513.32 = 322.40 : x
  2. Step 2: Convert to fraction form
    372.30/513.32 = 322.40/x
  3. Step 3: Cross multiply
    372.30x = 513.32 × 322.40
  4. Step 4: Simplify right side
    372.30x = 165,494.37
  5. Step 5: Solve for x
    x = 165,494.37/372.30
  6. Step 6: Final answer
    x = 444.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.