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Finding the Fourth Proportional to 800.76, 1,201.08 and 435.44

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Solution

The fourth proportional to 800.76, 1,201.08 and 435.44 is: 653.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.76 : 1,201.08 = 435.44 : x
  2. Step 2: Convert to fraction form
    800.76/1,201.08 = 435.44/x
  3. Step 3: Cross multiply
    800.76x = 1,201.08 × 435.44
  4. Step 4: Simplify right side
    800.76x = 522,998.28
  5. Step 5: Solve for x
    x = 522,998.28/800.76
  6. Step 6: Final answer
    x = 653.13

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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.