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Finding the Fourth Proportional to 552.50, 762.45 and 319.63

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Solution

The fourth proportional to 552.50, 762.45 and 319.63 is: 441.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.50 : 762.45 = 319.63 : x
  2. Step 2: Convert to fraction form
    552.50/762.45 = 319.63/x
  3. Step 3: Cross multiply
    552.50x = 762.45 × 319.63
  4. Step 4: Simplify right side
    552.50x = 243,701.89
  5. Step 5: Solve for x
    x = 243,701.89/552.50
  6. Step 6: Final answer
    x = 441.09

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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.