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Finding the Fourth Proportional to 1,809.40, 2,714.10 and 576.81

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Solution

The fourth proportional to 1,809.40, 2,714.10 and 576.81 is: 865.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,809.40 : 2,714.10 = 576.81 : x
  2. Step 2: Convert to fraction form
    1,809.40/2,714.10 = 576.81/x
  3. Step 3: Cross multiply
    1,809.40x = 2,714.10 × 576.81
  4. Step 4: Simplify right side
    1,809.40x = 1,565,517.14
  5. Step 5: Solve for x
    x = 1,565,517.14/1,809.40
  6. Step 6: Final answer
    x = 865.22

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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.