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Finding the Fourth Proportional to 2.30, 3.45 and 1.17

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Solution

The fourth proportional to 2.30, 3.45 and 1.17 is: 1.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.30 : 3.45 = 1.17 : x
  2. Step 2: Convert to fraction form
    2.30/3.45 = 1.17/x
  3. Step 3: Cross multiply
    2.30x = 3.45 × 1.17
  4. Step 4: Simplify right side
    2.30x = 4.02
  5. Step 5: Solve for x
    x = 4.02/2.30
  6. Step 6: Final answer
    x = 1.75

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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.