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Finding the Fourth Proportional to 799.74, 1,200.06 and 655.20

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Solution

The fourth proportional to 799.74, 1,200.06 and 655.20 is: 983.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    799.74 : 1,200.06 = 655.20 : x
  2. Step 2: Convert to fraction form
    799.74/1,200.06 = 655.20/x
  3. Step 3: Cross multiply
    799.74x = 1,200.06 × 655.20
  4. Step 4: Simplify right side
    799.74x = 786,279.31
  5. Step 5: Solve for x
    x = 786,279.31/799.74
  6. Step 6: Final answer
    x = 983.17

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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.