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Finding the Fourth Proportional to 53.18, 80.26 and 52.64

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Solution

The fourth proportional to 53.18, 80.26 and 52.64 is: 79.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.18 : 80.26 = 52.64 : x
  2. Step 2: Convert to fraction form
    53.18/80.26 = 52.64/x
  3. Step 3: Cross multiply
    53.18x = 80.26 × 52.64
  4. Step 4: Simplify right side
    53.18x = 4,224.89
  5. Step 5: Solve for x
    x = 4,224.89/53.18
  6. Step 6: Final answer
    x = 79.45

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.