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Finding the Fourth Proportional to 800.79, 1,201.18 and 253.01

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Solution

The fourth proportional to 800.79, 1,201.18 and 253.01 is: 379.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.79 : 1,201.18 = 253.01 : x
  2. Step 2: Convert to fraction form
    800.79/1,201.18 = 253.01/x
  3. Step 3: Cross multiply
    800.79x = 1,201.18 × 253.01
  4. Step 4: Simplify right side
    800.79x = 303,913.87
  5. Step 5: Solve for x
    x = 303,913.87/800.79
  6. Step 6: Final answer
    x = 379.52

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Similar ratio
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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.