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Finding the Fourth Proportional to 845.51, 1,266.44 and 411.75

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Solution

The fourth proportional to 845.51, 1,266.44 and 411.75 is: 616.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.51 : 1,266.44 = 411.75 : x
  2. Step 2: Convert to fraction form
    845.51/1,266.44 = 411.75/x
  3. Step 3: Cross multiply
    845.51x = 1,266.44 × 411.75
  4. Step 4: Simplify right side
    845.51x = 521,454.61
  5. Step 5: Solve for x
    x = 521,454.61/845.51
  6. Step 6: Final answer
    x = 616.74

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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.