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Finding the Fourth Proportional to 976.21, 1,347.21 and 534.13

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Solution

The fourth proportional to 976.21, 1,347.21 and 534.13 is: 737.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    976.21 : 1,347.21 = 534.13 : x
  2. Step 2: Convert to fraction form
    976.21/1,347.21 = 534.13/x
  3. Step 3: Cross multiply
    976.21x = 1,347.21 × 534.13
  4. Step 4: Simplify right side
    976.21x = 719,581.91
  5. Step 5: Solve for x
    x = 719,581.91/976.21
  6. Step 6: Final answer
    x = 737.12

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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.