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Finding the Fourth Proportional to 62.95, 86.47 and 56.48

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Solution

The fourth proportional to 62.95, 86.47 and 56.48 is: 77.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.95 : 86.47 = 56.48 : x
  2. Step 2: Convert to fraction form
    62.95/86.47 = 56.48/x
  3. Step 3: Cross multiply
    62.95x = 86.47 × 56.48
  4. Step 4: Simplify right side
    62.95x = 4,883.83
  5. Step 5: Solve for x
    x = 4,883.83/62.95
  6. Step 6: Final answer
    x = 77.58

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.