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Finding the Fourth Proportional to 56.22, 77.33 and 45.28

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Solution

The fourth proportional to 56.22, 77.33 and 45.28 is: 62.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.22 : 77.33 = 45.28 : x
  2. Step 2: Convert to fraction form
    56.22/77.33 = 45.28/x
  3. Step 3: Cross multiply
    56.22x = 77.33 × 45.28
  4. Step 4: Simplify right side
    56.22x = 3,501.50
  5. Step 5: Solve for x
    x = 3,501.50/56.22
  6. Step 6: Final answer
    x = 62.28

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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.