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Finding the Fourth Proportional to 3,264.72, 4,504.86 and 1,920.39

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Solution

The fourth proportional to 3,264.72, 4,504.86 and 1,920.39 is: 2,649.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,264.72 : 4,504.86 = 1,920.39 : x
  2. Step 2: Convert to fraction form
    3,264.72/4,504.86 = 1,920.39/x
  3. Step 3: Cross multiply
    3,264.72x = 4,504.86 × 1,920.39
  4. Step 4: Simplify right side
    3,264.72x = 8,651,088.10
  5. Step 5: Solve for x
    x = 8,651,088.10/3,264.72
  6. Step 6: Final answer
    x = 2,649.87

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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.