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Finding the Fourth Proportional to 711.12, 1,066.05 and 277.97

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Solution

The fourth proportional to 711.12, 1,066.05 and 277.97 is: 416.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.12 : 1,066.05 = 277.97 : x
  2. Step 2: Convert to fraction form
    711.12/1,066.05 = 277.97/x
  3. Step 3: Cross multiply
    711.12x = 1,066.05 × 277.97
  4. Step 4: Simplify right side
    711.12x = 296,332.58
  5. Step 5: Solve for x
    x = 296,332.58/711.12
  6. Step 6: Final answer
    x = 416.71

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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.