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Finding the Fourth Proportional to 700.78, 1,050.99 and 238.55

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Solution

The fourth proportional to 700.78, 1,050.99 and 238.55 is: 357.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.78 : 1,050.99 = 238.55 : x
  2. Step 2: Convert to fraction form
    700.78/1,050.99 = 238.55/x
  3. Step 3: Cross multiply
    700.78x = 1,050.99 × 238.55
  4. Step 4: Simplify right side
    700.78x = 250,713.66
  5. Step 5: Solve for x
    x = 250,713.66/700.78
  6. Step 6: Final answer
    x = 357.76

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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.