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Finding the Fourth Proportional to 798.72, 1,198.72 and 433.76

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Solution

The fourth proportional to 798.72, 1,198.72 and 433.76 is: 650.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    798.72 : 1,198.72 = 433.76 : x
  2. Step 2: Convert to fraction form
    798.72/1,198.72 = 433.76/x
  3. Step 3: Cross multiply
    798.72x = 1,198.72 × 433.76
  4. Step 4: Simplify right side
    798.72x = 519,956.79
  5. Step 5: Solve for x
    x = 519,956.79/798.72
  6. Step 6: Final answer
    x = 650.99

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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.