Home / 1,439.32-2,155.88-822.70

Finding the Fourth Proportional to 1,439.32, 2,155.88 and 822.70

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Solution

The fourth proportional to 1,439.32, 2,155.88 and 822.70 is: 1,232.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.32 : 2,155.88 = 822.70 : x
  2. Step 2: Convert to fraction form
    1,439.32/2,155.88 = 822.70/x
  3. Step 3: Cross multiply
    1,439.32x = 2,155.88 × 822.70
  4. Step 4: Simplify right side
    1,439.32x = 1,773,642.48
  5. Step 5: Solve for x
    x = 1,773,642.48/1,439.32
  6. Step 6: Final answer
    x = 1,232.28

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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.