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Finding the Fourth Proportional to 1,244.70, 1,719.23 and 912.60

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Solution

The fourth proportional to 1,244.70, 1,719.23 and 912.60 is: 1,260.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,244.70 : 1,719.23 = 912.60 : x
  2. Step 2: Convert to fraction form
    1,244.70/1,719.23 = 912.60/x
  3. Step 3: Cross multiply
    1,244.70x = 1,719.23 × 912.60
  4. Step 4: Simplify right side
    1,244.70x = 1,568,964.74
  5. Step 5: Solve for x
    x = 1,568,964.74/1,244.70
  6. Step 6: Final answer
    x = 1,260.52

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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.