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Finding the Fourth Proportional to 1,198.79, 1,785.54 and 1,145.48

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Solution

The fourth proportional to 1,198.79, 1,785.54 and 1,145.48 is: 1,706.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,198.79 : 1,785.54 = 1,145.48 : x
  2. Step 2: Convert to fraction form
    1,198.79/1,785.54 = 1,145.48/x
  3. Step 3: Cross multiply
    1,198.79x = 1,785.54 × 1,145.48
  4. Step 4: Simplify right side
    1,198.79x = 2,045,294.63
  5. Step 5: Solve for x
    x = 2,045,294.63/1,198.79
  6. Step 6: Final answer
    x = 1,706.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.