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Finding the Fourth Proportional to 1,653.43, 2,479.42 and 626.71

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Solution

The fourth proportional to 1,653.43, 2,479.42 and 626.71 is: 939.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,653.43 : 2,479.42 = 626.71 : x
  2. Step 2: Convert to fraction form
    1,653.43/2,479.42 = 626.71/x
  3. Step 3: Cross multiply
    1,653.43x = 2,479.42 × 626.71
  4. Step 4: Simplify right side
    1,653.43x = 1,553,861.78
  5. Step 5: Solve for x
    x = 1,553,861.78/1,653.43
  6. Step 6: Final answer
    x = 939.78

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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.