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Finding the Fourth Proportional to 2,671.76, 4,007.76 and 940.64

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Solution

The fourth proportional to 2,671.76, 4,007.76 and 940.64 is: 1,411.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,671.76 : 4,007.76 = 940.64 : x
  2. Step 2: Convert to fraction form
    2,671.76/4,007.76 = 940.64/x
  3. Step 3: Cross multiply
    2,671.76x = 4,007.76 × 940.64
  4. Step 4: Simplify right side
    2,671.76x = 3,769,859.37
  5. Step 5: Solve for x
    x = 3,769,859.37/2,671.76
  6. Step 6: Final answer
    x = 1,411.00

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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.