Home / 4,259.46-6,388.71-1,139.79

Finding the Fourth Proportional to 4,259.46, 6,388.71 and 1,139.79

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Solution

The fourth proportional to 4,259.46, 6,388.71 and 1,139.79 is: 1,709.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,259.46 : 6,388.71 = 1,139.79 : x
  2. Step 2: Convert to fraction form
    4,259.46/6,388.71 = 1,139.79/x
  3. Step 3: Cross multiply
    4,259.46x = 6,388.71 × 1,139.79
  4. Step 4: Simplify right side
    4,259.46x = 7,281,787.77
  5. Step 5: Solve for x
    x = 7,281,787.77/4,259.46
  6. Step 6: Final answer
    x = 1,709.56

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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.