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Finding the Fourth Proportional to 3,112.32, 4,668.32 and 803.76

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Solution

The fourth proportional to 3,112.32, 4,668.32 and 803.76 is: 1,205.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,112.32 : 4,668.32 = 803.76 : x
  2. Step 2: Convert to fraction form
    3,112.32/4,668.32 = 803.76/x
  3. Step 3: Cross multiply
    3,112.32x = 4,668.32 × 803.76
  4. Step 4: Simplify right side
    3,112.32x = 3,752,208.88
  5. Step 5: Solve for x
    x = 3,752,208.88/3,112.32
  6. Step 6: Final answer
    x = 1,205.60

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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.