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Finding the Fourth Proportional to 797.76, 1,100.08 and 649.92

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Solution

The fourth proportional to 797.76, 1,100.08 and 649.92 is: 896.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    797.76 : 1,100.08 = 649.92 : x
  2. Step 2: Convert to fraction form
    797.76/1,100.08 = 649.92/x
  3. Step 3: Cross multiply
    797.76x = 1,100.08 × 649.92
  4. Step 4: Simplify right side
    797.76x = 714,963.99
  5. Step 5: Solve for x
    x = 714,963.99/797.76
  6. Step 6: Final answer
    x = 896.21

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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.