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Finding the Fourth Proportional to 849.16, 1,273.20 and 328.88

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Solution

The fourth proportional to 849.16, 1,273.20 and 328.88 is: 493.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.16 : 1,273.20 = 328.88 : x
  2. Step 2: Convert to fraction form
    849.16/1,273.20 = 328.88/x
  3. Step 3: Cross multiply
    849.16x = 1,273.20 × 328.88
  4. Step 4: Simplify right side
    849.16x = 418,730.02
  5. Step 5: Solve for x
    x = 418,730.02/849.16
  6. Step 6: Final answer
    x = 493.11

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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.