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Finding the Fourth Proportional to 5.79, 8 and 5.23

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Solution

The fourth proportional to 5.79, 8 and 5.23 is: 7.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.79 : 8 = 5.23 : x
  2. Step 2: Convert to fraction form
    5.79/8 = 5.23/x
  3. Step 3: Cross multiply
    5.79x = 8 × 5.23
  4. Step 4: Simplify right side
    5.79x = 41.84
  5. Step 5: Solve for x
    x = 41.84/5.79
  6. Step 6: Final answer
    x = 7.23

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1.5x scale

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.