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Finding the Fourth Proportional to 4.64, 6.40 and 2.82

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Solution

The fourth proportional to 4.64, 6.40 and 2.82 is: 3.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    4.64 : 6.40 = 2.82 : x
  2. Step 2: Convert to fraction form
    4.64/6.40 = 2.82/x
  3. Step 3: Cross multiply
    4.64x = 6.40 × 2.82
  4. Step 4: Simplify right side
    4.64x = 18.07
  5. Step 5: Solve for x
    x = 18.07/4.64
  6. Step 6: Final answer
    x = 3.89

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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.