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Finding the Fourth Proportional to 1,085.64, 1,626.36 and 674.94

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Solution

The fourth proportional to 1,085.64, 1,626.36 and 674.94 is: 1,011.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,085.64 : 1,626.36 = 674.94 : x
  2. Step 2: Convert to fraction form
    1,085.64/1,626.36 = 674.94/x
  3. Step 3: Cross multiply
    1,085.64x = 1,626.36 × 674.94
  4. Step 4: Simplify right side
    1,085.64x = 1,097,695.42
  5. Step 5: Solve for x
    x = 1,097,695.42/1,085.64
  6. Step 6: Final answer
    x = 1,011.10

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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.