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Finding the Fourth Proportional to 1,516.46, 2,274.72 and 785.56

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Solution

The fourth proportional to 1,516.46, 2,274.72 and 785.56 is: 1,178.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,516.46 : 2,274.72 = 785.56 : x
  2. Step 2: Convert to fraction form
    1,516.46/2,274.72 = 785.56/x
  3. Step 3: Cross multiply
    1,516.46x = 2,274.72 × 785.56
  4. Step 4: Simplify right side
    1,516.46x = 1,786,929.04
  5. Step 5: Solve for x
    x = 1,786,929.04/1,516.46
  6. Step 6: Final answer
    x = 1,178.36

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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.