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Finding the Fourth Proportional to 798.30, 1,197.78 and 490.16

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Solution

The fourth proportional to 798.30, 1,197.78 and 490.16 is: 735.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    798.30 : 1,197.78 = 490.16 : x
  2. Step 2: Convert to fraction form
    798.30/1,197.78 = 490.16/x
  3. Step 3: Cross multiply
    798.30x = 1,197.78 × 490.16
  4. Step 4: Simplify right side
    798.30x = 587,103.84
  5. Step 5: Solve for x
    x = 587,103.84/798.30
  6. Step 6: Final answer
    x = 735.44

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Double scale
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1.5x scale

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.