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Finding the Fourth Proportional to 804.97, 1,207.61 and 285.12

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Solution

The fourth proportional to 804.97, 1,207.61 and 285.12 is: 427.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.97 : 1,207.61 = 285.12 : x
  2. Step 2: Convert to fraction form
    804.97/1,207.61 = 285.12/x
  3. Step 3: Cross multiply
    804.97x = 1,207.61 × 285.12
  4. Step 4: Simplify right side
    804.97x = 344,313.76
  5. Step 5: Solve for x
    x = 344,313.76/804.97
  6. Step 6: Final answer
    x = 427.73

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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.