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Finding the Fourth Proportional to 46.37, 69.10 and 45.21

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Solution

The fourth proportional to 46.37, 69.10 and 45.21 is: 67.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    46.37 : 69.10 = 45.21 : x
  2. Step 2: Convert to fraction form
    46.37/69.10 = 45.21/x
  3. Step 3: Cross multiply
    46.37x = 69.10 × 45.21
  4. Step 4: Simplify right side
    46.37x = 3,123.44
  5. Step 5: Solve for x
    x = 3,123.44/46.37
  6. Step 6: Final answer
    x = 67.36

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.