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Finding the Fourth Proportional to 552.50, 762.48 and 511.28

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Solution

The fourth proportional to 552.50, 762.48 and 511.28 is: 705.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.50 : 762.48 = 511.28 : x
  2. Step 2: Convert to fraction form
    552.50/762.48 = 511.28/x
  3. Step 3: Cross multiply
    552.50x = 762.48 × 511.28
  4. Step 4: Simplify right side
    552.50x = 389,840.77
  5. Step 5: Solve for x
    x = 389,840.77/552.50
  6. Step 6: Final answer
    x = 705.59

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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.