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Finding the Fourth Proportional to 1,067.58, 1,473.21 and 619.38

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Solution

The fourth proportional to 1,067.58, 1,473.21 and 619.38 is: 854.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,067.58 : 1,473.21 = 619.38 : x
  2. Step 2: Convert to fraction form
    1,067.58/1,473.21 = 619.38/x
  3. Step 3: Cross multiply
    1,067.58x = 1,473.21 × 619.38
  4. Step 4: Simplify right side
    1,067.58x = 912,476.81
  5. Step 5: Solve for x
    x = 912,476.81/1,067.58
  6. Step 6: Final answer
    x = 854.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.