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Finding the Fourth Proportional to 56.01, 77.29 and 31.44

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Solution

The fourth proportional to 56.01, 77.29 and 31.44 is: 43.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.01 : 77.29 = 31.44 : x
  2. Step 2: Convert to fraction form
    56.01/77.29 = 31.44/x
  3. Step 3: Cross multiply
    56.01x = 77.29 × 31.44
  4. Step 4: Simplify right side
    56.01x = 2,430.21
  5. Step 5: Solve for x
    x = 2,430.21/56.01
  6. Step 6: Final answer
    x = 43.39

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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.