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Finding the Fourth Proportional to 5.26, 7.88 and 3.57

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Solution

The fourth proportional to 5.26, 7.88 and 3.57 is: 5.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.26 : 7.88 = 3.57 : x
  2. Step 2: Convert to fraction form
    5.26/7.88 = 3.57/x
  3. Step 3: Cross multiply
    5.26x = 7.88 × 3.57
  4. Step 4: Simplify right side
    5.26x = 28.13
  5. Step 5: Solve for x
    x = 28.13/5.26
  6. Step 6: Final answer
    x = 5.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.