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Finding the Fourth Proportional to 693.30, 1,040.11 and 231.05

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Solution

The fourth proportional to 693.30, 1,040.11 and 231.05 is: 346.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.30 : 1,040.11 = 231.05 : x
  2. Step 2: Convert to fraction form
    693.30/1,040.11 = 231.05/x
  3. Step 3: Cross multiply
    693.30x = 1,040.11 × 231.05
  4. Step 4: Simplify right side
    693.30x = 240,317.42
  5. Step 5: Solve for x
    x = 240,317.42/693.30
  6. Step 6: Final answer
    x = 346.63

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.