Home / 1,439.38-2,160.08-823.58

Finding the Fourth Proportional to 1,439.38, 2,160.08 and 823.58

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Solution

The fourth proportional to 1,439.38, 2,160.08 and 823.58 is: 1,235.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.38 : 2,160.08 = 823.58 : x
  2. Step 2: Convert to fraction form
    1,439.38/2,160.08 = 823.58/x
  3. Step 3: Cross multiply
    1,439.38x = 2,160.08 × 823.58
  4. Step 4: Simplify right side
    1,439.38x = 1,778,998.69
  5. Step 5: Solve for x
    x = 1,778,998.69/1,439.38
  6. Step 6: Final answer
    x = 1,235.95

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1.5x scale

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.