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Finding the Fourth Proportional to 52.89, 79.21 and 52.39

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Solution

The fourth proportional to 52.89, 79.21 and 52.39 is: 78.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.89 : 79.21 = 52.39 : x
  2. Step 2: Convert to fraction form
    52.89/79.21 = 52.39/x
  3. Step 3: Cross multiply
    52.89x = 79.21 × 52.39
  4. Step 4: Simplify right side
    52.89x = 4,149.81
  5. Step 5: Solve for x
    x = 4,149.81/52.89
  6. Step 6: Final answer
    x = 78.46

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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.