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Finding the Fourth Proportional to 56.49, 85.24 and 53.55

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Solution

The fourth proportional to 56.49, 85.24 and 53.55 is: 80.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.49 : 85.24 = 53.55 : x
  2. Step 2: Convert to fraction form
    56.49/85.24 = 53.55/x
  3. Step 3: Cross multiply
    56.49x = 85.24 × 53.55
  4. Step 4: Simplify right side
    56.49x = 4,564.60
  5. Step 5: Solve for x
    x = 4,564.60/56.49
  6. Step 6: Final answer
    x = 80.80

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.