Home / 1,372.51-2,048.83-1,280.30

Finding the Fourth Proportional to 1,372.51, 2,048.83 and 1,280.30

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Solution

The fourth proportional to 1,372.51, 2,048.83 and 1,280.30 is: 1,911.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,372.51 : 2,048.83 = 1,280.30 : x
  2. Step 2: Convert to fraction form
    1,372.51/2,048.83 = 1,280.30/x
  3. Step 3: Cross multiply
    1,372.51x = 2,048.83 × 1,280.30
  4. Step 4: Simplify right side
    1,372.51x = 2,623,117.05
  5. Step 5: Solve for x
    x = 2,623,117.05/1,372.51
  6. Step 6: Final answer
    x = 1,911.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.