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Finding the Fourth Proportional to 46.39, 64.47 and 45.91

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Solution

The fourth proportional to 46.39, 64.47 and 45.91 is: 63.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    46.39 : 64.47 = 45.91 : x
  2. Step 2: Convert to fraction form
    46.39/64.47 = 45.91/x
  3. Step 3: Cross multiply
    46.39x = 64.47 × 45.91
  4. Step 4: Simplify right side
    46.39x = 2,959.82
  5. Step 5: Solve for x
    x = 2,959.82/46.39
  6. Step 6: Final answer
    x = 63.80

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.