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Finding the Fourth Proportional to 801.02, 1,199.90 and 558.02

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Solution

The fourth proportional to 801.02, 1,199.90 and 558.02 is: 835.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.02 : 1,199.90 = 558.02 : x
  2. Step 2: Convert to fraction form
    801.02/1,199.90 = 558.02/x
  3. Step 3: Cross multiply
    801.02x = 1,199.90 × 558.02
  4. Step 4: Simplify right side
    801.02x = 669,568.20
  5. Step 5: Solve for x
    x = 669,568.20/801.02
  6. Step 6: Final answer
    x = 835.89

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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.