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Finding the Fourth Proportional to 1,253.42, 1,879.60 and 473.28

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Solution

The fourth proportional to 1,253.42, 1,879.60 and 473.28 is: 709.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,253.42 : 1,879.60 = 473.28 : x
  2. Step 2: Convert to fraction form
    1,253.42/1,879.60 = 473.28/x
  3. Step 3: Cross multiply
    1,253.42x = 1,879.60 × 473.28
  4. Step 4: Simplify right side
    1,253.42x = 889,577.09
  5. Step 5: Solve for x
    x = 889,577.09/1,253.42
  6. Step 6: Final answer
    x = 709.72

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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.