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Finding the Fourth Proportional to 798.08, 1,100.44 and 561.95

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Solution

The fourth proportional to 798.08, 1,100.44 and 561.95 is: 774.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    798.08 : 1,100.44 = 561.95 : x
  2. Step 2: Convert to fraction form
    798.08/1,100.44 = 561.95/x
  3. Step 3: Cross multiply
    798.08x = 1,100.44 × 561.95
  4. Step 4: Simplify right side
    798.08x = 618,389.48
  5. Step 5: Solve for x
    x = 618,389.48/798.08
  6. Step 6: Final answer
    x = 774.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.