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Finding the Fourth Proportional to 40.83, 56.36 and 30.98

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Solution

The fourth proportional to 40.83, 56.36 and 30.98 is: 42.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.83 : 56.36 = 30.98 : x
  2. Step 2: Convert to fraction form
    40.83/56.36 = 30.98/x
  3. Step 3: Cross multiply
    40.83x = 56.36 × 30.98
  4. Step 4: Simplify right side
    40.83x = 1,746.03
  5. Step 5: Solve for x
    x = 1,746.03/40.83
  6. Step 6: Final answer
    x = 42.76

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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.