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Finding the Fourth Proportional to 6.26, 9.40 and 5.13

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Solution

The fourth proportional to 6.26, 9.40 and 5.13 is: 7.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    6.26 : 9.40 = 5.13 : x
  2. Step 2: Convert to fraction form
    6.26/9.40 = 5.13/x
  3. Step 3: Cross multiply
    6.26x = 9.40 × 5.13
  4. Step 4: Simplify right side
    6.26x = 48.22
  5. Step 5: Solve for x
    x = 48.22/6.26
  6. Step 6: Final answer
    x = 7.70

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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.