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Finding the Fourth Proportional to 5,681.03, 7,839.98 and 3,290.78

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Solution

The fourth proportional to 5,681.03, 7,839.98 and 3,290.78 is: 4,541.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,681.03 : 7,839.98 = 3,290.78 : x
  2. Step 2: Convert to fraction form
    5,681.03/7,839.98 = 3,290.78/x
  3. Step 3: Cross multiply
    5,681.03x = 7,839.98 × 3,290.78
  4. Step 4: Simplify right side
    5,681.03x = 25,799,593.73
  5. Step 5: Solve for x
    x = 25,799,593.73/5,681.03
  6. Step 6: Final answer
    x = 4,541.36

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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.