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Finding the Fourth Proportional to 1,475.43, 2,214.30 and 551.63

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Solution

The fourth proportional to 1,475.43, 2,214.30 and 551.63 is: 827.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,475.43 : 2,214.30 = 551.63 : x
  2. Step 2: Convert to fraction form
    1,475.43/2,214.30 = 551.63/x
  3. Step 3: Cross multiply
    1,475.43x = 2,214.30 × 551.63
  4. Step 4: Simplify right side
    1,475.43x = 1,221,463.24
  5. Step 5: Solve for x
    x = 1,221,463.24/1,475.43
  6. Step 6: Final answer
    x = 827.87

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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.