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Finding the Fourth Proportional to 799.60, 1,199.40 and 474.80

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Solution

The fourth proportional to 799.60, 1,199.40 and 474.80 is: 712.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    799.60 : 1,199.40 = 474.80 : x
  2. Step 2: Convert to fraction form
    799.60/1,199.40 = 474.80/x
  3. Step 3: Cross multiply
    799.60x = 1,199.40 × 474.80
  4. Step 4: Simplify right side
    799.60x = 569,475.12
  5. Step 5: Solve for x
    x = 569,475.12/799.60
  6. Step 6: Final answer
    x = 712.20

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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.