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Finding the Fourth Proportional to 799.86, 1,200.30 and 453.06

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Solution

The fourth proportional to 799.86, 1,200.30 and 453.06 is: 679.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    799.86 : 1,200.30 = 453.06 : x
  2. Step 2: Convert to fraction form
    799.86/1,200.30 = 453.06/x
  3. Step 3: Cross multiply
    799.86x = 1,200.30 × 453.06
  4. Step 4: Simplify right side
    799.86x = 543,807.92
  5. Step 5: Solve for x
    x = 543,807.92/799.86
  6. Step 6: Final answer
    x = 679.88

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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.