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Finding the Fourth Proportional to 2,618.92, 3,929.10 and 887.68

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Solution

The fourth proportional to 2,618.92, 3,929.10 and 887.68 is: 1,331.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,618.92 : 3,929.10 = 887.68 : x
  2. Step 2: Convert to fraction form
    2,618.92/3,929.10 = 887.68/x
  3. Step 3: Cross multiply
    2,618.92x = 3,929.10 × 887.68
  4. Step 4: Simplify right side
    2,618.92x = 3,487,783.49
  5. Step 5: Solve for x
    x = 3,487,783.49/2,618.92
  6. Step 6: Final answer
    x = 1,331.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.