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Finding the Fourth Proportional to 64.25, 88.63 and 40.95

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Solution

The fourth proportional to 64.25, 88.63 and 40.95 is: 56.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.25 : 88.63 = 40.95 : x
  2. Step 2: Convert to fraction form
    64.25/88.63 = 40.95/x
  3. Step 3: Cross multiply
    64.25x = 88.63 × 40.95
  4. Step 4: Simplify right side
    64.25x = 3,629.40
  5. Step 5: Solve for x
    x = 3,629.40/64.25
  6. Step 6: Final answer
    x = 56.49

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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.