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Finding the Fourth Proportional to 739.33, 1,021.31 and 700.45

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Solution

The fourth proportional to 739.33, 1,021.31 and 700.45 is: 967.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.33 : 1,021.31 = 700.45 : x
  2. Step 2: Convert to fraction form
    739.33/1,021.31 = 700.45/x
  3. Step 3: Cross multiply
    739.33x = 1,021.31 × 700.45
  4. Step 4: Simplify right side
    739.33x = 715,376.59
  5. Step 5: Solve for x
    x = 715,376.59/739.33
  6. Step 6: Final answer
    x = 967.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.