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Finding the Fourth Proportional to 798.02, 1,198.90 and 469.79

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Solution

The fourth proportional to 798.02, 1,198.90 and 469.79 is: 705.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    798.02 : 1,198.90 = 469.79 : x
  2. Step 2: Convert to fraction form
    798.02/1,198.90 = 469.79/x
  3. Step 3: Cross multiply
    798.02x = 1,198.90 × 469.79
  4. Step 4: Simplify right side
    798.02x = 563,230.32
  5. Step 5: Solve for x
    x = 563,230.32/798.02
  6. Step 6: Final answer
    x = 705.79

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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.