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Finding the Fourth Proportional to 1,220.84, 1,829.92 and 804.20

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Solution

The fourth proportional to 1,220.84, 1,829.92 and 804.20 is: 1,205.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220.84 : 1,829.92 = 804.20 : x
  2. Step 2: Convert to fraction form
    1,220.84/1,829.92 = 804.20/x
  3. Step 3: Cross multiply
    1,220.84x = 1,829.92 × 804.20
  4. Step 4: Simplify right side
    1,220.84x = 1,471,621.66
  5. Step 5: Solve for x
    x = 1,471,621.66/1,220.84
  6. Step 6: Final answer
    x = 1,205.42

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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.