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Finding the Fourth Proportional to 52.49, 78.64 and 38.93

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Solution

The fourth proportional to 52.49, 78.64 and 38.93 is: 58.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.49 : 78.64 = 38.93 : x
  2. Step 2: Convert to fraction form
    52.49/78.64 = 38.93/x
  3. Step 3: Cross multiply
    52.49x = 78.64 × 38.93
  4. Step 4: Simplify right side
    52.49x = 3,060.96
  5. Step 5: Solve for x
    x = 3,060.96/52.49
  6. Step 6: Final answer
    x = 58.31

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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.