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Finding the Fourth Proportional to 1,387.73, 2,069.15 and 1,363.13

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Solution

The fourth proportional to 1,387.73, 2,069.15 and 1,363.13 is: 2,032.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387.73 : 2,069.15 = 1,363.13 : x
  2. Step 2: Convert to fraction form
    1,387.73/2,069.15 = 1,363.13/x
  3. Step 3: Cross multiply
    1,387.73x = 2,069.15 × 1,363.13
  4. Step 4: Simplify right side
    1,387.73x = 2,820,511.04
  5. Step 5: Solve for x
    x = 2,820,511.04/1,387.73
  6. Step 6: Final answer
    x = 2,032.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.