Home / 1,550.28-2,138.62-1,439.10

Finding the Fourth Proportional to 1,550.28, 2,138.62 and 1,439.10

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Solution

The fourth proportional to 1,550.28, 2,138.62 and 1,439.10 is: 1,985.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,550.28 : 2,138.62 = 1,439.10 : x
  2. Step 2: Convert to fraction form
    1,550.28/2,138.62 = 1,439.10/x
  3. Step 3: Cross multiply
    1,550.28x = 2,138.62 × 1,439.10
  4. Step 4: Simplify right side
    1,550.28x = 3,077,688.04
  5. Step 5: Solve for x
    x = 3,077,688.04/1,550.28
  6. Step 6: Final answer
    x = 1,985.25

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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.