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Finding the Fourth Proportional to 1,476.72, 2,037.84 and 813.60

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Solution

The fourth proportional to 1,476.72, 2,037.84 and 813.60 is: 1,122.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,476.72 : 2,037.84 = 813.60 : x
  2. Step 2: Convert to fraction form
    1,476.72/2,037.84 = 813.60/x
  3. Step 3: Cross multiply
    1,476.72x = 2,037.84 × 813.60
  4. Step 4: Simplify right side
    1,476.72x = 1,657,986.62
  5. Step 5: Solve for x
    x = 1,657,986.62/1,476.72
  6. Step 6: Final answer
    x = 1,122.75

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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.