Home / 1,439.12-2,158.44-669.44

Finding the Fourth Proportional to 1,439.12, 2,158.44 and 669.44

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Solution

The fourth proportional to 1,439.12, 2,158.44 and 669.44 is: 1,004.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.12 : 2,158.44 = 669.44 : x
  2. Step 2: Convert to fraction form
    1,439.12/2,158.44 = 669.44/x
  3. Step 3: Cross multiply
    1,439.12x = 2,158.44 × 669.44
  4. Step 4: Simplify right side
    1,439.12x = 1,444,946.07
  5. Step 5: Solve for x
    x = 1,444,946.07/1,439.12
  6. Step 6: Final answer
    x = 1,004.05

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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.