Home / 3,312.64-4,967.40-1,120.78

Finding the Fourth Proportional to 3,312.64, 4,967.40 and 1,120.78

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Solution

The fourth proportional to 3,312.64, 4,967.40 and 1,120.78 is: 1,680.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,312.64 : 4,967.40 = 1,120.78 : x
  2. Step 2: Convert to fraction form
    3,312.64/4,967.40 = 1,120.78/x
  3. Step 3: Cross multiply
    3,312.64x = 4,967.40 × 1,120.78
  4. Step 4: Simplify right side
    3,312.64x = 5,567,362.57
  5. Step 5: Solve for x
    x = 5,567,362.57/3,312.64
  6. Step 6: Final answer
    x = 1,680.64

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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.