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Finding the Fourth Proportional to 43.65, 64.98 and 43.43

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Solution

The fourth proportional to 43.65, 64.98 and 43.43 is: 64.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.65 : 64.98 = 43.43 : x
  2. Step 2: Convert to fraction form
    43.65/64.98 = 43.43/x
  3. Step 3: Cross multiply
    43.65x = 64.98 × 43.43
  4. Step 4: Simplify right side
    43.65x = 2,821.76
  5. Step 5: Solve for x
    x = 2,821.76/43.65
  6. Step 6: Final answer
    x = 64.65

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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.