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Finding the Fourth Proportional to 845.29, 1,266.79 and 433.56

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Solution

The fourth proportional to 845.29, 1,266.79 and 433.56 is: 649.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.29 : 1,266.79 = 433.56 : x
  2. Step 2: Convert to fraction form
    845.29/1,266.79 = 433.56/x
  3. Step 3: Cross multiply
    845.29x = 1,266.79 × 433.56
  4. Step 4: Simplify right side
    845.29x = 549,229.47
  5. Step 5: Solve for x
    x = 549,229.47/845.29
  6. Step 6: Final answer
    x = 649.75

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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.