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Finding the Fourth Proportional to 710.85, 1,066.38 and 190.87

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Solution

The fourth proportional to 710.85, 1,066.38 and 190.87 is: 286.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.85 : 1,066.38 = 190.87 : x
  2. Step 2: Convert to fraction form
    710.85/1,066.38 = 190.87/x
  3. Step 3: Cross multiply
    710.85x = 1,066.38 × 190.87
  4. Step 4: Simplify right side
    710.85x = 203,536.57
  5. Step 5: Solve for x
    x = 203,536.57/710.85
  6. Step 6: Final answer
    x = 286.33

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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.