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Finding the Fourth Proportional to 1,476.40, 2,037.43 and 813.29

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Solution

The fourth proportional to 1,476.40, 2,037.43 and 813.29 is: 1,122.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,476.40 : 2,037.43 = 813.29 : x
  2. Step 2: Convert to fraction form
    1,476.40/2,037.43 = 813.29/x
  3. Step 3: Cross multiply
    1,476.40x = 2,037.43 × 813.29
  4. Step 4: Simplify right side
    1,476.40x = 1,657,009.22
  5. Step 5: Solve for x
    x = 1,657,009.22/1,476.40
  6. Step 6: Final answer
    x = 1,122.33

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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.