Home / 2,853.29-4,280.15-905.51

Finding the Fourth Proportional to 2,853.29, 4,280.15 and 905.51

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Solution

The fourth proportional to 2,853.29, 4,280.15 and 905.51 is: 1,358.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,853.29 : 4,280.15 = 905.51 : x
  2. Step 2: Convert to fraction form
    2,853.29/4,280.15 = 905.51/x
  3. Step 3: Cross multiply
    2,853.29x = 4,280.15 × 905.51
  4. Step 4: Simplify right side
    2,853.29x = 3,875,731.59
  5. Step 5: Solve for x
    x = 3,875,731.59/2,853.29
  6. Step 6: Final answer
    x = 1,358.34

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Double scale
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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.