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Finding the Fourth Proportional to 3.55, 4.87 and 3.53

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Solution

The fourth proportional to 3.55, 4.87 and 3.53 is: 4.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3.55 : 4.87 = 3.53 : x
  2. Step 2: Convert to fraction form
    3.55/4.87 = 3.53/x
  3. Step 3: Cross multiply
    3.55x = 4.87 × 3.53
  4. Step 4: Simplify right side
    3.55x = 17.19
  5. Step 5: Solve for x
    x = 17.19/3.55
  6. Step 6: Final answer
    x = 4.84

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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.