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Finding the Fourth Proportional to 5,720.51, 7,891.98 and 3,480.59

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Solution

The fourth proportional to 5,720.51, 7,891.98 and 3,480.59 is: 4,801.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,720.51 : 7,891.98 = 3,480.59 : x
  2. Step 2: Convert to fraction form
    5,720.51/7,891.98 = 3,480.59/x
  3. Step 3: Cross multiply
    5,720.51x = 7,891.98 × 3,480.59
  4. Step 4: Simplify right side
    5,720.51x = 27,468,746.67
  5. Step 5: Solve for x
    x = 27,468,746.67/5,720.51
  6. Step 6: Final answer
    x = 4,801.80

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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.