Home / 1,479.25-2,219.28-709.75

Finding the Fourth Proportional to 1,479.25, 2,219.28 and 709.75

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Solution

The fourth proportional to 1,479.25, 2,219.28 and 709.75 is: 1,064.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,479.25 : 2,219.28 = 709.75 : x
  2. Step 2: Convert to fraction form
    1,479.25/2,219.28 = 709.75/x
  3. Step 3: Cross multiply
    1,479.25x = 2,219.28 × 709.75
  4. Step 4: Simplify right side
    1,479.25x = 1,575,133.98
  5. Step 5: Solve for x
    x = 1,575,133.98/1,479.25
  6. Step 6: Final answer
    x = 1,064.82

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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.