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Finding the Fourth Proportional to 971.08, 1,340.15 and 551.27

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Solution

The fourth proportional to 971.08, 1,340.15 and 551.27 is: 760.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    971.08 : 1,340.15 = 551.27 : x
  2. Step 2: Convert to fraction form
    971.08/1,340.15 = 551.27/x
  3. Step 3: Cross multiply
    971.08x = 1,340.15 × 551.27
  4. Step 4: Simplify right side
    971.08x = 738,784.49
  5. Step 5: Solve for x
    x = 738,784.49/971.08
  6. Step 6: Final answer
    x = 760.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.