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Finding the Fourth Proportional to 798.82, 1,196.70 and 615.32

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Solution

The fourth proportional to 798.82, 1,196.70 and 615.32 is: 921.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    798.82 : 1,196.70 = 615.32 : x
  2. Step 2: Convert to fraction form
    798.82/1,196.70 = 615.32/x
  3. Step 3: Cross multiply
    798.82x = 1,196.70 × 615.32
  4. Step 4: Simplify right side
    798.82x = 736,354.74
  5. Step 5: Solve for x
    x = 736,354.74/798.82
  6. Step 6: Final answer
    x = 921.80

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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.