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Finding the Fourth Proportional to 700.38, 1,050.79 and 213.43

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Solution

The fourth proportional to 700.38, 1,050.79 and 213.43 is: 320.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.38 : 1,050.79 = 213.43 : x
  2. Step 2: Convert to fraction form
    700.38/1,050.79 = 213.43/x
  3. Step 3: Cross multiply
    700.38x = 1,050.79 × 213.43
  4. Step 4: Simplify right side
    700.38x = 224,268.02
  5. Step 5: Solve for x
    x = 224,268.02/700.38
  6. Step 6: Final answer
    x = 320.21

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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.