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Finding the Fourth Proportional to 849.72, 1,273.91 and 302.30

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Solution

The fourth proportional to 849.72, 1,273.91 and 302.30 is: 453.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.72 : 1,273.91 = 302.30 : x
  2. Step 2: Convert to fraction form
    849.72/1,273.91 = 302.30/x
  3. Step 3: Cross multiply
    849.72x = 1,273.91 × 302.30
  4. Step 4: Simplify right side
    849.72x = 385,095.11
  5. Step 5: Solve for x
    x = 385,095.11/849.72
  6. Step 6: Final answer
    x = 453.20

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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.