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Finding the Fourth Proportional to 56.81, 84.68 and 56.72

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Solution

The fourth proportional to 56.81, 84.68 and 56.72 is: 84.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.81 : 84.68 = 56.72 : x
  2. Step 2: Convert to fraction form
    56.81/84.68 = 56.72/x
  3. Step 3: Cross multiply
    56.81x = 84.68 × 56.72
  4. Step 4: Simplify right side
    56.81x = 4,802.77
  5. Step 5: Solve for x
    x = 4,802.77/56.81
  6. Step 6: Final answer
    x = 84.54

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.