Home / 1,489.18-2,235.22-709.70

Finding the Fourth Proportional to 1,489.18, 2,235.22 and 709.70

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Solution

The fourth proportional to 1,489.18, 2,235.22 and 709.70 is: 1,065.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,489.18 : 2,235.22 = 709.70 : x
  2. Step 2: Convert to fraction form
    1,489.18/2,235.22 = 709.70/x
  3. Step 3: Cross multiply
    1,489.18x = 2,235.22 × 709.70
  4. Step 4: Simplify right side
    1,489.18x = 1,586,335.63
  5. Step 5: Solve for x
    x = 1,586,335.63/1,489.18
  6. Step 6: Final answer
    x = 1,065.24

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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.