Home / 1,439.43-1,984.73-1,228.92

Finding the Fourth Proportional to 1,439.43, 1,984.73 and 1,228.92

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Solution

The fourth proportional to 1,439.43, 1,984.73 and 1,228.92 is: 1,694.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.43 : 1,984.73 = 1,228.92 : x
  2. Step 2: Convert to fraction form
    1,439.43/1,984.73 = 1,228.92/x
  3. Step 3: Cross multiply
    1,439.43x = 1,984.73 × 1,228.92
  4. Step 4: Simplify right side
    1,439.43x = 2,439,068.25
  5. Step 5: Solve for x
    x = 2,439,068.25/1,439.43
  6. Step 6: Final answer
    x = 1,694.47

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.