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Finding the Fourth Proportional to 40.58, 56.23 and 40

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Solution

The fourth proportional to 40.58, 56.23 and 40 is: 55.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.58 : 56.23 = 40 : x
  2. Step 2: Convert to fraction form
    40.58/56.23 = 40/x
  3. Step 3: Cross multiply
    40.58x = 56.23 × 40
  4. Step 4: Simplify right side
    40.58x = 2,249.20
  5. Step 5: Solve for x
    x = 2,249.20/40.58
  6. Step 6: Final answer
    x = 55.43

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1.5x scale

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.