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Finding the Fourth Proportional to 40.34, 56.06 and 39.83

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Solution

The fourth proportional to 40.34, 56.06 and 39.83 is: 55.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.34 : 56.06 = 39.83 : x
  2. Step 2: Convert to fraction form
    40.34/56.06 = 39.83/x
  3. Step 3: Cross multiply
    40.34x = 56.06 × 39.83
  4. Step 4: Simplify right side
    40.34x = 2,232.87
  5. Step 5: Solve for x
    x = 2,232.87/40.34
  6. Step 6: Final answer
    x = 55.35

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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.