Home / 1,439.16-2,160.90-823.56

Finding the Fourth Proportional to 1,439.16, 2,160.90 and 823.56

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Solution

The fourth proportional to 1,439.16, 2,160.90 and 823.56 is: 1,236.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.16 : 2,160.90 = 823.56 : x
  2. Step 2: Convert to fraction form
    1,439.16/2,160.90 = 823.56/x
  3. Step 3: Cross multiply
    1,439.16x = 2,160.90 × 823.56
  4. Step 4: Simplify right side
    1,439.16x = 1,779,630.80
  5. Step 5: Solve for x
    x = 1,779,630.80/1,439.16
  6. Step 6: Final answer
    x = 1,236.58

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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.