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Finding the Fourth Proportional to 1,317.77, 1,976.82 and 484.89

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Solution

The fourth proportional to 1,317.77, 1,976.82 and 484.89 is: 727.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.77 : 1,976.82 = 484.89 : x
  2. Step 2: Convert to fraction form
    1,317.77/1,976.82 = 484.89/x
  3. Step 3: Cross multiply
    1,317.77x = 1,976.82 × 484.89
  4. Step 4: Simplify right side
    1,317.77x = 958,533.75
  5. Step 5: Solve for x
    x = 958,533.75/1,317.77
  6. Step 6: Final answer
    x = 727.39

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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.