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Finding the Fourth Proportional to 1.04, 1.43 and 0.63

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Solution

The fourth proportional to 1.04, 1.43 and 0.63 is: 0.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1.04 : 1.43 = 0.63 : x
  2. Step 2: Convert to fraction form
    1.04/1.43 = 0.63/x
  3. Step 3: Cross multiply
    1.04x = 1.43 × 0.63
  4. Step 4: Simplify right side
    1.04x = 0.90
  5. Step 5: Solve for x
    x = 0.90/1.04
  6. Step 6: Final answer
    x = 0.87

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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.