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Finding the Fourth Proportional to 4,719.17, 7,079.01 and 1,209.20

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Solution

The fourth proportional to 4,719.17, 7,079.01 and 1,209.20 is: 1,813.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,719.17 : 7,079.01 = 1,209.20 : x
  2. Step 2: Convert to fraction form
    4,719.17/7,079.01 = 1,209.20/x
  3. Step 3: Cross multiply
    4,719.17x = 7,079.01 × 1,209.20
  4. Step 4: Simplify right side
    4,719.17x = 8,559,932.85
  5. Step 5: Solve for x
    x = 8,559,932.85/4,719.17
  6. Step 6: Final answer
    x = 1,813.87

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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.