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Finding the Fourth Proportional to 693.93, 1,040.55 and 231.55

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Solution

The fourth proportional to 693.93, 1,040.55 and 231.55 is: 347.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.93 : 1,040.55 = 231.55 : x
  2. Step 2: Convert to fraction form
    693.93/1,040.55 = 231.55/x
  3. Step 3: Cross multiply
    693.93x = 1,040.55 × 231.55
  4. Step 4: Simplify right side
    693.93x = 240,939.35
  5. Step 5: Solve for x
    x = 240,939.35/693.93
  6. Step 6: Final answer
    x = 347.21

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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.