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Finding the Fourth Proportional to 53.14, 79.63 and 39.55

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Solution

The fourth proportional to 53.14, 79.63 and 39.55 is: 59.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.14 : 79.63 = 39.55 : x
  2. Step 2: Convert to fraction form
    53.14/79.63 = 39.55/x
  3. Step 3: Cross multiply
    53.14x = 79.63 × 39.55
  4. Step 4: Simplify right side
    53.14x = 3,148.77
  5. Step 5: Solve for x
    x = 3,148.77/53.14
  6. Step 6: Final answer
    x = 59.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.