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Finding the Fourth Proportional to 818.28, 1,220.76 and 695.16

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Solution

The fourth proportional to 818.28, 1,220.76 and 695.16 is: 1,037.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.28 : 1,220.76 = 695.16 : x
  2. Step 2: Convert to fraction form
    818.28/1,220.76 = 695.16/x
  3. Step 3: Cross multiply
    818.28x = 1,220.76 × 695.16
  4. Step 4: Simplify right side
    818.28x = 848,623.52
  5. Step 5: Solve for x
    x = 848,623.52/818.28
  6. Step 6: Final answer
    x = 1,037.08

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.