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Finding the Fourth Proportional to 3,369, 4,649.28 and 1,971.72

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Solution

The fourth proportional to 3,369, 4,649.28 and 1,971.72 is: 2,721.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,369 : 4,649.28 = 1,971.72 : x
  2. Step 2: Convert to fraction form
    3,369/4,649.28 = 1,971.72/x
  3. Step 3: Cross multiply
    3,369x = 4,649.28 × 1,971.72
  4. Step 4: Simplify right side
    3,369x = 9,167,078.36
  5. Step 5: Solve for x
    x = 9,167,078.36/3,369
  6. Step 6: Final answer
    x = 2,721.01

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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.