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Finding the Fourth Proportional to 1,813.30, 2,716.80 and 837.40

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Solution

The fourth proportional to 1,813.30, 2,716.80 and 837.40 is: 1,254.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,813.30 : 2,716.80 = 837.40 : x
  2. Step 2: Convert to fraction form
    1,813.30/2,716.80 = 837.40/x
  3. Step 3: Cross multiply
    1,813.30x = 2,716.80 × 837.40
  4. Step 4: Simplify right side
    1,813.30x = 2,275,048.32
  5. Step 5: Solve for x
    x = 2,275,048.32/1,813.30
  6. Step 6: Final answer
    x = 1,254.65

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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.