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Finding the Fourth Proportional to 1,255.84, 1,883.40 and 378.31

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Solution

The fourth proportional to 1,255.84, 1,883.40 and 378.31 is: 567.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,255.84 : 1,883.40 = 378.31 : x
  2. Step 2: Convert to fraction form
    1,255.84/1,883.40 = 378.31/x
  3. Step 3: Cross multiply
    1,255.84x = 1,883.40 × 378.31
  4. Step 4: Simplify right side
    1,255.84x = 712,509.05
  5. Step 5: Solve for x
    x = 712,509.05/1,255.84
  6. Step 6: Final answer
    x = 567.36

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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.