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Finding the Fourth Proportional to 1.60, 2.40 and 1.45

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Solution

The fourth proportional to 1.60, 2.40 and 1.45 is: 2.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1.60 : 2.40 = 1.45 : x
  2. Step 2: Convert to fraction form
    1.60/2.40 = 1.45/x
  3. Step 3: Cross multiply
    1.60x = 2.40 × 1.45
  4. Step 4: Simplify right side
    1.60x = 3.48
  5. Step 5: Solve for x
    x = 3.48/1.60
  6. Step 6: Final answer
    x = 2.18

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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.