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Finding the Fourth Proportional to 56.79, 85.10 and 36.45

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Solution

The fourth proportional to 56.79, 85.10 and 36.45 is: 54.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.79 : 85.10 = 36.45 : x
  2. Step 2: Convert to fraction form
    56.79/85.10 = 36.45/x
  3. Step 3: Cross multiply
    56.79x = 85.10 × 36.45
  4. Step 4: Simplify right side
    56.79x = 3,101.71
  5. Step 5: Solve for x
    x = 3,101.71/56.79
  6. Step 6: Final answer
    x = 54.62

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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.