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Finding the Fourth Proportional to 710.67, 1,066.02 and 217.09

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Solution

The fourth proportional to 710.67, 1,066.02 and 217.09 is: 325.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.67 : 1,066.02 = 217.09 : x
  2. Step 2: Convert to fraction form
    710.67/1,066.02 = 217.09/x
  3. Step 3: Cross multiply
    710.67x = 1,066.02 × 217.09
  4. Step 4: Simplify right side
    710.67x = 231,422.28
  5. Step 5: Solve for x
    x = 231,422.28/710.67
  6. Step 6: Final answer
    x = 325.64

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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.