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Finding the Fourth Proportional to 1,255.61, 1,883.73 and 378.08

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Solution

The fourth proportional to 1,255.61, 1,883.73 and 378.08 is: 567.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,255.61 : 1,883.73 = 378.08 : x
  2. Step 2: Convert to fraction form
    1,255.61/1,883.73 = 378.08/x
  3. Step 3: Cross multiply
    1,255.61x = 1,883.73 × 378.08
  4. Step 4: Simplify right side
    1,255.61x = 712,191.22
  5. Step 5: Solve for x
    x = 712,191.22/1,255.61
  6. Step 6: Final answer
    x = 567.21

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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.