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Finding the Fourth Proportional to 1,253.10, 1,879.80 and 375.65

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Solution

The fourth proportional to 1,253.10, 1,879.80 and 375.65 is: 563.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,253.10 : 1,879.80 = 375.65 : x
  2. Step 2: Convert to fraction form
    1,253.10/1,879.80 = 375.65/x
  3. Step 3: Cross multiply
    1,253.10x = 1,879.80 × 375.65
  4. Step 4: Simplify right side
    1,253.10x = 706,137.47
  5. Step 5: Solve for x
    x = 706,137.47/1,253.10
  6. Step 6: Final answer
    x = 563.51

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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.