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Finding the Fourth Proportional to 46.34, 63.74 and 40.78

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Solution

The fourth proportional to 46.34, 63.74 and 40.78 is: 56.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    46.34 : 63.74 = 40.78 : x
  2. Step 2: Convert to fraction form
    46.34/63.74 = 40.78/x
  3. Step 3: Cross multiply
    46.34x = 63.74 × 40.78
  4. Step 4: Simplify right side
    46.34x = 2,599.32
  5. Step 5: Solve for x
    x = 2,599.32/46.34
  6. Step 6: Final answer
    x = 56.09

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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.