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Finding the Fourth Proportional to 2,961.64, 4,443.10 and 1,113.32

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Solution

The fourth proportional to 2,961.64, 4,443.10 and 1,113.32 is: 1,670.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,961.64 : 4,443.10 = 1,113.32 : x
  2. Step 2: Convert to fraction form
    2,961.64/4,443.10 = 1,113.32/x
  3. Step 3: Cross multiply
    2,961.64x = 4,443.10 × 1,113.32
  4. Step 4: Simplify right side
    2,961.64x = 4,946,592.09
  5. Step 5: Solve for x
    x = 4,946,592.09/2,961.64
  6. Step 6: Final answer
    x = 1,670.22

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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.