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Finding the Fourth Proportional to 56.35, 77.72 and 45.98

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Solution

The fourth proportional to 56.35, 77.72 and 45.98 is: 63.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.35 : 77.72 = 45.98 : x
  2. Step 2: Convert to fraction form
    56.35/77.72 = 45.98/x
  3. Step 3: Cross multiply
    56.35x = 77.72 × 45.98
  4. Step 4: Simplify right side
    56.35x = 3,573.67
  5. Step 5: Solve for x
    x = 3,573.67/56.35
  6. Step 6: Final answer
    x = 63.42

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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.