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Finding the Fourth Proportional to 5.77, 8.62 and 5.43

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Solution

The fourth proportional to 5.77, 8.62 and 5.43 is: 8.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.77 : 8.62 = 5.43 : x
  2. Step 2: Convert to fraction form
    5.77/8.62 = 5.43/x
  3. Step 3: Cross multiply
    5.77x = 8.62 × 5.43
  4. Step 4: Simplify right side
    5.77x = 46.81
  5. Step 5: Solve for x
    x = 46.81/5.77
  6. Step 6: Final answer
    x = 8.11

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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.