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Finding the Fourth Proportional to 2.40, 3.58 and 2.10

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Solution

The fourth proportional to 2.40, 3.58 and 2.10 is: 3.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.40 : 3.58 = 2.10 : x
  2. Step 2: Convert to fraction form
    2.40/3.58 = 2.10/x
  3. Step 3: Cross multiply
    2.40x = 3.58 × 2.10
  4. Step 4: Simplify right side
    2.40x = 7.52
  5. Step 5: Solve for x
    x = 7.52/2.40
  6. Step 6: Final answer
    x = 3.13

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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.