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Finding the Fourth Proportional to 1,212.24, 1,672.52 and 798.16

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Solution

The fourth proportional to 1,212.24, 1,672.52 and 798.16 is: 1,101.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212.24 : 1,672.52 = 798.16 : x
  2. Step 2: Convert to fraction form
    1,212.24/1,672.52 = 798.16/x
  3. Step 3: Cross multiply
    1,212.24x = 1,672.52 × 798.16
  4. Step 4: Simplify right side
    1,212.24x = 1,334,938.56
  5. Step 5: Solve for x
    x = 1,334,938.56/1,212.24
  6. Step 6: Final answer
    x = 1,101.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.