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Finding the Fourth Proportional to 1,244.69, 1,718.45 and 803.41

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Solution

The fourth proportional to 1,244.69, 1,718.45 and 803.41 is: 1,109.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,244.69 : 1,718.45 = 803.41 : x
  2. Step 2: Convert to fraction form
    1,244.69/1,718.45 = 803.41/x
  3. Step 3: Cross multiply
    1,244.69x = 1,718.45 × 803.41
  4. Step 4: Simplify right side
    1,244.69x = 1,380,619.91
  5. Step 5: Solve for x
    x = 1,380,619.91/1,244.69
  6. Step 6: Final answer
    x = 1,109.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.