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Finding the Fourth Proportional to 45, 61.98 and 43.26

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Solution

The fourth proportional to 45, 61.98 and 43.26 is: 59.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    45 : 61.98 = 43.26 : x
  2. Step 2: Convert to fraction form
    45/61.98 = 43.26/x
  3. Step 3: Cross multiply
    45x = 61.98 × 43.26
  4. Step 4: Simplify right side
    45x = 2,681.25
  5. Step 5: Solve for x
    x = 2,681.25/45
  6. Step 6: Final answer
    x = 59.58

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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.