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Finding the Fourth Proportional to 46.43, 69.30 and 40.05

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Solution

The fourth proportional to 46.43, 69.30 and 40.05 is: 59.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    46.43 : 69.30 = 40.05 : x
  2. Step 2: Convert to fraction form
    46.43/69.30 = 40.05/x
  3. Step 3: Cross multiply
    46.43x = 69.30 × 40.05
  4. Step 4: Simplify right side
    46.43x = 2,775.47
  5. Step 5: Solve for x
    x = 2,775.47/46.43
  6. Step 6: Final answer
    x = 59.78

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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.