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Finding the Fourth Proportional to 1,357.37, 1,873.11 and 767.91

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Solution

The fourth proportional to 1,357.37, 1,873.11 and 767.91 is: 1,059.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,357.37 : 1,873.11 = 767.91 : x
  2. Step 2: Convert to fraction form
    1,357.37/1,873.11 = 767.91/x
  3. Step 3: Cross multiply
    1,357.37x = 1,873.11 × 767.91
  4. Step 4: Simplify right side
    1,357.37x = 1,438,376.06
  5. Step 5: Solve for x
    x = 1,438,376.06/1,357.37
  6. Step 6: Final answer
    x = 1,059.68

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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.