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Finding the Fourth Proportional to 817.03, 1,225.56 and 655.75

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Solution

The fourth proportional to 817.03, 1,225.56 and 655.75 is: 983.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    817.03 : 1,225.56 = 655.75 : x
  2. Step 2: Convert to fraction form
    817.03/1,225.56 = 655.75/x
  3. Step 3: Cross multiply
    817.03x = 1,225.56 × 655.75
  4. Step 4: Simplify right side
    817.03x = 803,660.97
  5. Step 5: Solve for x
    x = 803,660.97/817.03
  6. Step 6: Final answer
    x = 983.64

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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.