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Finding the Fourth Proportional to 7.01, 10.45 and 6.40

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Solution

The fourth proportional to 7.01, 10.45 and 6.40 is: 9.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7.01 : 10.45 = 6.40 : x
  2. Step 2: Convert to fraction form
    7.01/10.45 = 6.40/x
  3. Step 3: Cross multiply
    7.01x = 10.45 × 6.40
  4. Step 4: Simplify right side
    7.01x = 66.88
  5. Step 5: Solve for x
    x = 66.88/7.01
  6. Step 6: Final answer
    x = 9.54

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.