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Finding the Fourth Proportional to 794.08, 1,189.89 and 485.47

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Solution

The fourth proportional to 794.08, 1,189.89 and 485.47 is: 727.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    794.08 : 1,189.89 = 485.47 : x
  2. Step 2: Convert to fraction form
    794.08/1,189.89 = 485.47/x
  3. Step 3: Cross multiply
    794.08x = 1,189.89 × 485.47
  4. Step 4: Simplify right side
    794.08x = 577,655.90
  5. Step 5: Solve for x
    x = 577,655.90/794.08
  6. Step 6: Final answer
    x = 727.45

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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.