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Finding the Fourth Proportional to 1,878.13, 2,817.69 and 708.15

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Solution

The fourth proportional to 1,878.13, 2,817.69 and 708.15 is: 1,062.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,878.13 : 2,817.69 = 708.15 : x
  2. Step 2: Convert to fraction form
    1,878.13/2,817.69 = 708.15/x
  3. Step 3: Cross multiply
    1,878.13x = 2,817.69 × 708.15
  4. Step 4: Simplify right side
    1,878.13x = 1,995,347.17
  5. Step 5: Solve for x
    x = 1,995,347.17/1,878.13
  6. Step 6: Final answer
    x = 1,062.41

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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.