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Finding the Fourth Proportional to 3,781.64, 5,646.98 and 3,089.68

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Solution

The fourth proportional to 3,781.64, 5,646.98 and 3,089.68 is: 4,613.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,781.64 : 5,646.98 = 3,089.68 : x
  2. Step 2: Convert to fraction form
    3,781.64/5,646.98 = 3,089.68/x
  3. Step 3: Cross multiply
    3,781.64x = 5,646.98 × 3,089.68
  4. Step 4: Simplify right side
    3,781.64x = 17,447,331.60
  5. Step 5: Solve for x
    x = 17,447,331.60/3,781.64
  6. Step 6: Final answer
    x = 4,613.69

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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.