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Finding the Fourth Proportional to 2,719.56, 4,079.95 and 988.19

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Solution

The fourth proportional to 2,719.56, 4,079.95 and 988.19 is: 1,482.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,719.56 : 4,079.95 = 988.19 : x
  2. Step 2: Convert to fraction form
    2,719.56/4,079.95 = 988.19/x
  3. Step 3: Cross multiply
    2,719.56x = 4,079.95 × 988.19
  4. Step 4: Simplify right side
    2,719.56x = 4,031,765.79
  5. Step 5: Solve for x
    x = 4,031,765.79/2,719.56
  6. Step 6: Final answer
    x = 1,482.51

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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.