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Finding the Fourth Proportional to 798.57, 1,197.93 and 221.45

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Solution

The fourth proportional to 798.57, 1,197.93 and 221.45 is: 332.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    798.57 : 1,197.93 = 221.45 : x
  2. Step 2: Convert to fraction form
    798.57/1,197.93 = 221.45/x
  3. Step 3: Cross multiply
    798.57x = 1,197.93 × 221.45
  4. Step 4: Simplify right side
    798.57x = 265,275.61
  5. Step 5: Solve for x
    x = 265,275.61/798.57
  6. Step 6: Final answer
    x = 332.19

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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.