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Finding the Fourth Proportional to 2,710.20, 4,065.62 and 860.66

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Solution

The fourth proportional to 2,710.20, 4,065.62 and 860.66 is: 1,291.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,710.20 : 4,065.62 = 860.66 : x
  2. Step 2: Convert to fraction form
    2,710.20/4,065.62 = 860.66/x
  3. Step 3: Cross multiply
    2,710.20x = 4,065.62 × 860.66
  4. Step 4: Simplify right side
    2,710.20x = 3,499,116.51
  5. Step 5: Solve for x
    x = 3,499,116.51/2,710.20
  6. Step 6: Final answer
    x = 1,291.09

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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.