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Finding the Fourth Proportional to 1,260.87, 1,739.98 and 729.81

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Solution

The fourth proportional to 1,260.87, 1,739.98 and 729.81 is: 1,007.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.87 : 1,739.98 = 729.81 : x
  2. Step 2: Convert to fraction form
    1,260.87/1,739.98 = 729.81/x
  3. Step 3: Cross multiply
    1,260.87x = 1,739.98 × 729.81
  4. Step 4: Simplify right side
    1,260.87x = 1,269,855.72
  5. Step 5: Solve for x
    x = 1,269,855.72/1,260.87
  6. Step 6: Final answer
    x = 1,007.13

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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.