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Finding the Fourth Proportional to 62.63, 86.51 and 57.06

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Solution

The fourth proportional to 62.63, 86.51 and 57.06 is: 78.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.63 : 86.51 = 57.06 : x
  2. Step 2: Convert to fraction form
    62.63/86.51 = 57.06/x
  3. Step 3: Cross multiply
    62.63x = 86.51 × 57.06
  4. Step 4: Simplify right side
    62.63x = 4,935.98
  5. Step 5: Solve for x
    x = 4,935.98/62.63
  6. Step 6: Final answer
    x = 78.82

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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.