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Finding the Fourth Proportional to 1,475.46, 2,214 and 551.66

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Solution

The fourth proportional to 1,475.46, 2,214 and 551.66 is: 827.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,475.46 : 2,214 = 551.66 : x
  2. Step 2: Convert to fraction form
    1,475.46/2,214 = 551.66/x
  3. Step 3: Cross multiply
    1,475.46x = 2,214 × 551.66
  4. Step 4: Simplify right side
    1,475.46x = 1,221,364.17
  5. Step 5: Solve for x
    x = 1,221,364.17/1,475.46
  6. Step 6: Final answer
    x = 827.79

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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.