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Finding the Fourth Proportional to 56.79, 85.14 and 32.72

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Solution

The fourth proportional to 56.79, 85.14 and 32.72 is: 49.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.79 : 85.14 = 32.72 : x
  2. Step 2: Convert to fraction form
    56.79/85.14 = 32.72/x
  3. Step 3: Cross multiply
    56.79x = 85.14 × 32.72
  4. Step 4: Simplify right side
    56.79x = 2,785.36
  5. Step 5: Solve for x
    x = 2,785.36/56.79
  6. Step 6: Final answer
    x = 49.05

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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.