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Finding the Fourth Proportional to 1,317.13, 1,976.00 and 451.39

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Solution

The fourth proportional to 1,317.13, 1,976.00 and 451.39 is: 677.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.13 : 1,976.00 = 451.39 : x
  2. Step 2: Convert to fraction form
    1,317.13/1,976.00 = 451.39/x
  3. Step 3: Cross multiply
    1,317.13x = 1,976.00 × 451.39
  4. Step 4: Simplify right side
    1,317.13x = 891,944.38
  5. Step 5: Solve for x
    x = 891,944.38/1,317.13
  6. Step 6: Final answer
    x = 677.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.