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Finding the Fourth Proportional to 62.48, 86.18 and 53.25

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Solution

The fourth proportional to 62.48, 86.18 and 53.25 is: 73.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.48 : 86.18 = 53.25 : x
  2. Step 2: Convert to fraction form
    62.48/86.18 = 53.25/x
  3. Step 3: Cross multiply
    62.48x = 86.18 × 53.25
  4. Step 4: Simplify right side
    62.48x = 4,588.82
  5. Step 5: Solve for x
    x = 4,588.82/62.48
  6. Step 6: Final answer
    x = 73.45

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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.