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Finding the Fourth Proportional to 1,274.76, 1,912.19 and 453.10

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Solution

The fourth proportional to 1,274.76, 1,912.19 and 453.10 is: 679.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,274.76 : 1,912.19 = 453.10 : x
  2. Step 2: Convert to fraction form
    1,274.76/1,912.19 = 453.10/x
  3. Step 3: Cross multiply
    1,274.76x = 1,912.19 × 453.10
  4. Step 4: Simplify right side
    1,274.76x = 866,406.24
  5. Step 5: Solve for x
    x = 866,406.24/1,274.76
  6. Step 6: Final answer
    x = 679.66

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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.