Home / 1,237.20-1,707.30-739.74

Finding the Fourth Proportional to 1,237.20, 1,707.30 and 739.74

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Solution

The fourth proportional to 1,237.20, 1,707.30 and 739.74 is: 1,020.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,237.20 : 1,707.30 = 739.74 : x
  2. Step 2: Convert to fraction form
    1,237.20/1,707.30 = 739.74/x
  3. Step 3: Cross multiply
    1,237.20x = 1,707.30 × 739.74
  4. Step 4: Simplify right side
    1,237.20x = 1,262,958.10
  5. Step 5: Solve for x
    x = 1,262,958.10/1,237.20
  6. Step 6: Final answer
    x = 1,020.82

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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.