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Finding the Fourth Proportional to 862.25, 1,190.02 and 568.13

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Solution

The fourth proportional to 862.25, 1,190.02 and 568.13 is: 784.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    862.25 : 1,190.02 = 568.13 : x
  2. Step 2: Convert to fraction form
    862.25/1,190.02 = 568.13/x
  3. Step 3: Cross multiply
    862.25x = 1,190.02 × 568.13
  4. Step 4: Simplify right side
    862.25x = 676,078.69
  5. Step 5: Solve for x
    x = 676,078.69/862.25
  6. Step 6: Final answer
    x = 784.08

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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.