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Finding the Fourth Proportional to 46.98, 64.86 and 39.66

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Solution

The fourth proportional to 46.98, 64.86 and 39.66 is: 54.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    46.98 : 64.86 = 39.66 : x
  2. Step 2: Convert to fraction form
    46.98/64.86 = 39.66/x
  3. Step 3: Cross multiply
    46.98x = 64.86 × 39.66
  4. Step 4: Simplify right side
    46.98x = 2,572.35
  5. Step 5: Solve for x
    x = 2,572.35/46.98
  6. Step 6: Final answer
    x = 54.75

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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.