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Finding the Fourth Proportional to 1,229.94, 1,845.18 and 579.78

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Solution

The fourth proportional to 1,229.94, 1,845.18 and 579.78 is: 869.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,229.94 : 1,845.18 = 579.78 : x
  2. Step 2: Convert to fraction form
    1,229.94/1,845.18 = 579.78/x
  3. Step 3: Cross multiply
    1,229.94x = 1,845.18 × 579.78
  4. Step 4: Simplify right side
    1,229.94x = 1,069,798.46
  5. Step 5: Solve for x
    x = 1,069,798.46/1,229.94
  6. Step 6: Final answer
    x = 869.80

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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.