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Finding the Fourth Proportional to 800.79, 1,201.19 and 435.08

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Solution

The fourth proportional to 800.79, 1,201.19 and 435.08 is: 652.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.79 : 1,201.19 = 435.08 : x
  2. Step 2: Convert to fraction form
    800.79/1,201.19 = 435.08/x
  3. Step 3: Cross multiply
    800.79x = 1,201.19 × 435.08
  4. Step 4: Simplify right side
    800.79x = 522,605.56
  5. Step 5: Solve for x
    x = 522,605.56/800.79
  6. Step 6: Final answer
    x = 652.61

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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.