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Finding the Fourth Proportional to 56.58, 84.88 and 20.02

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Solution

The fourth proportional to 56.58, 84.88 and 20.02 is: 30.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.58 : 84.88 = 20.02 : x
  2. Step 2: Convert to fraction form
    56.58/84.88 = 20.02/x
  3. Step 3: Cross multiply
    56.58x = 84.88 × 20.02
  4. Step 4: Simplify right side
    56.58x = 1,699.30
  5. Step 5: Solve for x
    x = 1,699.30/56.58
  6. Step 6: Final answer
    x = 30.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.