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Finding the Fourth Proportional to 971.00, 1,339.80 and 551.37

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Solution

The fourth proportional to 971.00, 1,339.80 and 551.37 is: 760.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    971.00 : 1,339.80 = 551.37 : x
  2. Step 2: Convert to fraction form
    971.00/1,339.80 = 551.37/x
  3. Step 3: Cross multiply
    971.00x = 1,339.80 × 551.37
  4. Step 4: Simplify right side
    971.00x = 738,727.59
  5. Step 5: Solve for x
    x = 738,727.59/971.00
  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.