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Finding the Fourth Proportional to 3,969.17, 5,973.68 and 2,987.07

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Solution

The fourth proportional to 3,969.17, 5,973.68 and 2,987.07 is: 4,495.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,969.17 : 5,973.68 = 2,987.07 : x
  2. Step 2: Convert to fraction form
    3,969.17/5,973.68 = 2,987.07/x
  3. Step 3: Cross multiply
    3,969.17x = 5,973.68 × 2,987.07
  4. Step 4: Simplify right side
    3,969.17x = 17,843,785.38
  5. Step 5: Solve for x
    x = 17,843,785.38/3,969.17
  6. Step 6: Final answer
    x = 4,495.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.