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Finding the Fourth Proportional to 1,255.56, 1,883.40 and 378.09

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Solution

The fourth proportional to 1,255.56, 1,883.40 and 378.09 is: 567.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,255.56 : 1,883.40 = 378.09 : x
  2. Step 2: Convert to fraction form
    1,255.56/1,883.40 = 378.09/x
  3. Step 3: Cross multiply
    1,255.56x = 1,883.40 × 378.09
  4. Step 4: Simplify right side
    1,255.56x = 712,094.71
  5. Step 5: Solve for x
    x = 712,094.71/1,255.56
  6. Step 6: Final answer
    x = 567.15

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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.