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Finding the Fourth Proportional to 1,476.78, 2,037.96 and 813.70

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Solution

The fourth proportional to 1,476.78, 2,037.96 and 813.70 is: 1,122.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,476.78 : 2,037.96 = 813.70 : x
  2. Step 2: Convert to fraction form
    1,476.78/2,037.96 = 813.70/x
  3. Step 3: Cross multiply
    1,476.78x = 2,037.96 × 813.70
  4. Step 4: Simplify right side
    1,476.78x = 1,658,279.14
  5. Step 5: Solve for x
    x = 1,658,279.14/1,476.78
  6. Step 6: Final answer
    x = 1,122.90

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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.