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Finding the Fourth Proportional to 976.52, 1,347.74 and 556.91

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Solution

The fourth proportional to 976.52, 1,347.74 and 556.91 is: 768.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    976.52 : 1,347.74 = 556.91 : x
  2. Step 2: Convert to fraction form
    976.52/1,347.74 = 556.91/x
  3. Step 3: Cross multiply
    976.52x = 1,347.74 × 556.91
  4. Step 4: Simplify right side
    976.52x = 750,564.66
  5. Step 5: Solve for x
    x = 750,564.66/976.52
  6. Step 6: Final answer
    x = 768.61

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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.