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Finding the Fourth Proportional to 783.41, 1,081.10 and 451.85

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Solution

The fourth proportional to 783.41, 1,081.10 and 451.85 is: 623.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    783.41 : 1,081.10 = 451.85 : x
  2. Step 2: Convert to fraction form
    783.41/1,081.10 = 451.85/x
  3. Step 3: Cross multiply
    783.41x = 1,081.10 × 451.85
  4. Step 4: Simplify right side
    783.41x = 488,487.37
  5. Step 5: Solve for x
    x = 488,487.37/783.41
  6. Step 6: Final answer
    x = 623.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.