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Finding the Fourth Proportional to 1,246.76, 1,720.52 and 679.59

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Solution

The fourth proportional to 1,246.76, 1,720.52 and 679.59 is: 937.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,246.76 : 1,720.52 = 679.59 : x
  2. Step 2: Convert to fraction form
    1,246.76/1,720.52 = 679.59/x
  3. Step 3: Cross multiply
    1,246.76x = 1,720.52 × 679.59
  4. Step 4: Simplify right side
    1,246.76x = 1,169,246.94
  5. Step 5: Solve for x
    x = 1,169,246.94/1,246.76
  6. Step 6: Final answer
    x = 937.83

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1.5x scale

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.