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Finding the Fourth Proportional to 1,229.61, 1,845.19 and 499.19

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Solution

The fourth proportional to 1,229.61, 1,845.19 and 499.19 is: 749.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,229.61 : 1,845.19 = 499.19 : x
  2. Step 2: Convert to fraction form
    1,229.61/1,845.19 = 499.19/x
  3. Step 3: Cross multiply
    1,229.61x = 1,845.19 × 499.19
  4. Step 4: Simplify right side
    1,229.61x = 921,100.40
  5. Step 5: Solve for x
    x = 921,100.40/1,229.61
  6. Step 6: Final answer
    x = 749.10

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Double scale
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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.