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Finding the Fourth Proportional to 52.90, 79.37 and 47.23

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Solution

The fourth proportional to 52.90, 79.37 and 47.23 is: 70.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.90 : 79.37 = 47.23 : x
  2. Step 2: Convert to fraction form
    52.90/79.37 = 47.23/x
  3. Step 3: Cross multiply
    52.90x = 79.37 × 47.23
  4. Step 4: Simplify right side
    52.90x = 3,748.43
  5. Step 5: Solve for x
    x = 3,748.43/52.90
  6. Step 6: Final answer
    x = 70.86

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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.