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Finding the Fourth Proportional to 2,710.23, 4,065.80 and 861.33

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Solution

The fourth proportional to 2,710.23, 4,065.80 and 861.33 is: 1,292.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,710.23 : 4,065.80 = 861.33 : x
  2. Step 2: Convert to fraction form
    2,710.23/4,065.80 = 861.33/x
  3. Step 3: Cross multiply
    2,710.23x = 4,065.80 × 861.33
  4. Step 4: Simplify right side
    2,710.23x = 3,502,006.45
  5. Step 5: Solve for x
    x = 3,502,006.45/2,710.23
  6. Step 6: Final answer
    x = 1,292.15

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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.