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Finding the Fourth Proportional to 1,255.89, 1,884.08 and 434.19

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Solution

The fourth proportional to 1,255.89, 1,884.08 and 434.19 is: 651.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,255.89 : 1,884.08 = 434.19 : x
  2. Step 2: Convert to fraction form
    1,255.89/1,884.08 = 434.19/x
  3. Step 3: Cross multiply
    1,255.89x = 1,884.08 × 434.19
  4. Step 4: Simplify right side
    1,255.89x = 818,048.70
  5. Step 5: Solve for x
    x = 818,048.70/1,255.89
  6. Step 6: Final answer
    x = 651.37

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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.