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Finding the Fourth Proportional to 739.04, 1,021 and 659.60

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Solution

The fourth proportional to 739.04, 1,021 and 659.60 is: 911.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.04 : 1,021 = 659.60 : x
  2. Step 2: Convert to fraction form
    739.04/1,021 = 659.60/x
  3. Step 3: Cross multiply
    739.04x = 1,021 × 659.60
  4. Step 4: Simplify right side
    739.04x = 673,451.60
  5. Step 5: Solve for x
    x = 673,451.60/739.04
  6. Step 6: Final answer
    x = 911.25

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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.