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Finding the Fourth Proportional to 46.54, 64.38 and 40.06

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Solution

The fourth proportional to 46.54, 64.38 and 40.06 is: 55.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    46.54 : 64.38 = 40.06 : x
  2. Step 2: Convert to fraction form
    46.54/64.38 = 40.06/x
  3. Step 3: Cross multiply
    46.54x = 64.38 × 40.06
  4. Step 4: Simplify right side
    46.54x = 2,579.06
  5. Step 5: Solve for x
    x = 2,579.06/46.54
  6. Step 6: Final answer
    x = 55.42

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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.