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Finding the Fourth Proportional to 64.85, 89.49 and 37.22

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Solution

The fourth proportional to 64.85, 89.49 and 37.22 is: 51.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.85 : 89.49 = 37.22 : x
  2. Step 2: Convert to fraction form
    64.85/89.49 = 37.22/x
  3. Step 3: Cross multiply
    64.85x = 89.49 × 37.22
  4. Step 4: Simplify right side
    64.85x = 3,330.37
  5. Step 5: Solve for x
    x = 3,330.37/64.85
  6. Step 6: Final answer
    x = 51.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.