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Finding the Fourth Proportional to 6.21, 8.53 and 5.77

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Solution

The fourth proportional to 6.21, 8.53 and 5.77 is: 7.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    6.21 : 8.53 = 5.77 : x
  2. Step 2: Convert to fraction form
    6.21/8.53 = 5.77/x
  3. Step 3: Cross multiply
    6.21x = 8.53 × 5.77
  4. Step 4: Simplify right side
    6.21x = 49.22
  5. Step 5: Solve for x
    x = 49.22/6.21
  6. Step 6: Final answer
    x = 7.93

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.