Home / 3,108.51-4,288.40-1,781.91

Finding the Fourth Proportional to 3,108.51, 4,288.40 and 1,781.91

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Solution

The fourth proportional to 3,108.51, 4,288.40 and 1,781.91 is: 2,458.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,108.51 : 4,288.40 = 1,781.91 : x
  2. Step 2: Convert to fraction form
    3,108.51/4,288.40 = 1,781.91/x
  3. Step 3: Cross multiply
    3,108.51x = 4,288.40 × 1,781.91
  4. Step 4: Simplify right side
    3,108.51x = 7,641,533.93
  5. Step 5: Solve for x
    x = 7,641,533.93/3,108.51
  6. Step 6: Final answer
    x = 2,458.26

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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.