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Finding the Fourth Proportional to 5,158.20, 7,231.20 and 5,158.20

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Solution

The fourth proportional to 5,158.20, 7,231.20 and 5,158.20 is: 7,231.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,158.20 : 7,231.20 = 5,158.20 : x
  2. Step 2: Convert to fraction form
    5,158.20/7,231.20 = 5,158.20/x
  3. Step 3: Cross multiply
    5,158.20x = 7,231.20 × 5,158.20
  4. Step 4: Simplify right side
    5,158.20x = 37,299,975.84
  5. Step 5: Solve for x
    x = 37,299,975.84/5,158.20
  6. Step 6: Final answer
    x = 7,231.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.