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Finding the Fourth Proportional to 4,479.21, 6,719.49 and 1,358.82

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Solution

The fourth proportional to 4,479.21, 6,719.49 and 1,358.82 is: 2,038.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,479.21 : 6,719.49 = 1,358.82 : x
  2. Step 2: Convert to fraction form
    4,479.21/6,719.49 = 1,358.82/x
  3. Step 3: Cross multiply
    4,479.21x = 6,719.49 × 1,358.82
  4. Step 4: Simplify right side
    4,479.21x = 9,130,577.40
  5. Step 5: Solve for x
    x = 9,130,577.40/4,479.21
  6. Step 6: Final answer
    x = 2,038.43

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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.