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Finding the Fourth Proportional to 5.59, 7.72 and 3.17

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Solution

The fourth proportional to 5.59, 7.72 and 3.17 is: 4.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.59 : 7.72 = 3.17 : x
  2. Step 2: Convert to fraction form
    5.59/7.72 = 3.17/x
  3. Step 3: Cross multiply
    5.59x = 7.72 × 3.17
  4. Step 4: Simplify right side
    5.59x = 24.45
  5. Step 5: Solve for x
    x = 24.45/5.59
  6. Step 6: Final answer
    x = 4.37

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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.