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Finding the Fourth Proportional to 1,260.25, 1,739.30 and 763.06

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Solution

The fourth proportional to 1,260.25, 1,739.30 and 763.06 is: 1,053.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.25 : 1,739.30 = 763.06 : x
  2. Step 2: Convert to fraction form
    1,260.25/1,739.30 = 763.06/x
  3. Step 3: Cross multiply
    1,260.25x = 1,739.30 × 763.06
  4. Step 4: Simplify right side
    1,260.25x = 1,327,190.26
  5. Step 5: Solve for x
    x = 1,327,190.26/1,260.25
  6. Step 6: Final answer
    x = 1,053.12

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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.