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Finding the Fourth Proportional to 1.47, 2.03 and 0.87

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Solution

The fourth proportional to 1.47, 2.03 and 0.87 is: 1.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1.47 : 2.03 = 0.87 : x
  2. Step 2: Convert to fraction form
    1.47/2.03 = 0.87/x
  3. Step 3: Cross multiply
    1.47x = 2.03 × 0.87
  4. Step 4: Simplify right side
    1.47x = 1.76
  5. Step 5: Solve for x
    x = 1.76/1.47
  6. Step 6: Final answer
    x = 1.20

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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.