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Finding the Fourth Proportional to 372.44, 555.98 and 320.50

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Solution

The fourth proportional to 372.44, 555.98 and 320.50 is: 478.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.44 : 555.98 = 320.50 : x
  2. Step 2: Convert to fraction form
    372.44/555.98 = 320.50/x
  3. Step 3: Cross multiply
    372.44x = 555.98 × 320.50
  4. Step 4: Simplify right side
    372.44x = 178,190.68
  5. Step 5: Solve for x
    x = 178,190.68/372.44
  6. Step 6: Final answer
    x = 478.44

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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.