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Finding the Fourth Proportional to 2,773.10, 4,159.38 and 721.10

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Solution

The fourth proportional to 2,773.10, 4,159.38 and 721.10 is: 1,081.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,773.10 : 4,159.38 = 721.10 : x
  2. Step 2: Convert to fraction form
    2,773.10/4,159.38 = 721.10/x
  3. Step 3: Cross multiply
    2,773.10x = 4,159.38 × 721.10
  4. Step 4: Simplify right side
    2,773.10x = 2,999,328.92
  5. Step 5: Solve for x
    x = 2,999,328.92/2,773.10
  6. Step 6: Final answer
    x = 1,081.58

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1.5x scale

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.