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Finding the Fourth Proportional to 1,808.65, 2,714.49 and 713.80

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Solution

The fourth proportional to 1,808.65, 2,714.49 and 713.80 is: 1,071.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,808.65 : 2,714.49 = 713.80 : x
  2. Step 2: Convert to fraction form
    1,808.65/2,714.49 = 713.80/x
  3. Step 3: Cross multiply
    1,808.65x = 2,714.49 × 713.80
  4. Step 4: Simplify right side
    1,808.65x = 1,937,602.96
  5. Step 5: Solve for x
    x = 1,937,602.96/1,808.65
  6. Step 6: Final answer
    x = 1,071.30

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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.