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Finding the Fourth Proportional to 976.71, 1,344.84 and 763.47

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Solution

The fourth proportional to 976.71, 1,344.84 and 763.47 is: 1,051.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    976.71 : 1,344.84 = 763.47 : x
  2. Step 2: Convert to fraction form
    976.71/1,344.84 = 763.47/x
  3. Step 3: Cross multiply
    976.71x = 1,344.84 × 763.47
  4. Step 4: Simplify right side
    976.71x = 1,026,744.99
  5. Step 5: Solve for x
    x = 1,026,744.99/976.71
  6. Step 6: Final answer
    x = 1,051.23

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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.