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Finding the Fourth Proportional to 1,376.93, 2,064.98 and 727.31

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Solution

The fourth proportional to 1,376.93, 2,064.98 and 727.31 is: 1,090.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,376.93 : 2,064.98 = 727.31 : x
  2. Step 2: Convert to fraction form
    1,376.93/2,064.98 = 727.31/x
  3. Step 3: Cross multiply
    1,376.93x = 2,064.98 × 727.31
  4. Step 4: Simplify right side
    1,376.93x = 1,501,866.64
  5. Step 5: Solve for x
    x = 1,501,866.64/1,376.93
  6. Step 6: Final answer
    x = 1,090.74

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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.