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Finding the Fourth Proportional to 62.77, 86.61 and 40.63

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Solution

The fourth proportional to 62.77, 86.61 and 40.63 is: 56.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.77 : 86.61 = 40.63 : x
  2. Step 2: Convert to fraction form
    62.77/86.61 = 40.63/x
  3. Step 3: Cross multiply
    62.77x = 86.61 × 40.63
  4. Step 4: Simplify right side
    62.77x = 3,518.96
  5. Step 5: Solve for x
    x = 3,518.96/62.77
  6. Step 6: Final answer
    x = 56.06

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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.