Home / 1,439.74-2,161.15-709.83

Finding the Fourth Proportional to 1,439.74, 2,161.15 and 709.83

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Solution

The fourth proportional to 1,439.74, 2,161.15 and 709.83 is: 1,065.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.74 : 2,161.15 = 709.83 : x
  2. Step 2: Convert to fraction form
    1,439.74/2,161.15 = 709.83/x
  3. Step 3: Cross multiply
    1,439.74x = 2,161.15 × 709.83
  4. Step 4: Simplify right side
    1,439.74x = 1,534,047.33
  5. Step 5: Solve for x
    x = 1,534,047.33/1,439.74
  6. Step 6: Final answer
    x = 1,065.50

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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.