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Finding the Fourth Proportional to 53.47, 79.67 and 51.53

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Solution

The fourth proportional to 53.47, 79.67 and 51.53 is: 76.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.47 : 79.67 = 51.53 : x
  2. Step 2: Convert to fraction form
    53.47/79.67 = 51.53/x
  3. Step 3: Cross multiply
    53.47x = 79.67 × 51.53
  4. Step 4: Simplify right side
    53.47x = 4,105.40
  5. Step 5: Solve for x
    x = 4,105.40/53.47
  6. Step 6: Final answer
    x = 76.78

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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.