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Finding the Fourth Proportional to 2,719.53, 4,079.30 and 988.29

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Solution

The fourth proportional to 2,719.53, 4,079.30 and 988.29 is: 1,482.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,719.53 : 4,079.30 = 988.29 : x
  2. Step 2: Convert to fraction form
    2,719.53/4,079.30 = 988.29/x
  3. Step 3: Cross multiply
    2,719.53x = 4,079.30 × 988.29
  4. Step 4: Simplify right side
    2,719.53x = 4,031,526.46
  5. Step 5: Solve for x
    x = 4,031,526.46/2,719.53
  6. Step 6: Final answer
    x = 1,482.44

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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.