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Finding the Fourth Proportional to 62.06, 85.70 and 47.38

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Solution

The fourth proportional to 62.06, 85.70 and 47.38 is: 65.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.06 : 85.70 = 47.38 : x
  2. Step 2: Convert to fraction form
    62.06/85.70 = 47.38/x
  3. Step 3: Cross multiply
    62.06x = 85.70 × 47.38
  4. Step 4: Simplify right side
    62.06x = 4,060.37
  5. Step 5: Solve for x
    x = 4,060.37/62.06
  6. Step 6: Final answer
    x = 65.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.