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Finding the Fourth Proportional to 1,540.60, 2,309.61 and 718.45

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Solution

The fourth proportional to 1,540.60, 2,309.61 and 718.45 is: 1,077.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,540.60 : 2,309.61 = 718.45 : x
  2. Step 2: Convert to fraction form
    1,540.60/2,309.61 = 718.45/x
  3. Step 3: Cross multiply
    1,540.60x = 2,309.61 × 718.45
  4. Step 4: Simplify right side
    1,540.60x = 1,659,339.30
  5. Step 5: Solve for x
    x = 1,659,339.30/1,540.60
  6. Step 6: Final answer
    x = 1,077.07

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1.5x scale

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.