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Finding the Fourth Proportional to 64.23, 88.61 and 40.94

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Solution

The fourth proportional to 64.23, 88.61 and 40.94 is: 56.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.23 : 88.61 = 40.94 : x
  2. Step 2: Convert to fraction form
    64.23/88.61 = 40.94/x
  3. Step 3: Cross multiply
    64.23x = 88.61 × 40.94
  4. Step 4: Simplify right side
    64.23x = 3,627.71
  5. Step 5: Solve for x
    x = 3,627.71/64.23
  6. Step 6: Final answer
    x = 56.48

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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.