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Finding the Fourth Proportional to 1,067.49, 1,472.49 and 788.45

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Solution

The fourth proportional to 1,067.49, 1,472.49 and 788.45 is: 1,087.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,067.49 : 1,472.49 = 788.45 : x
  2. Step 2: Convert to fraction form
    1,067.49/1,472.49 = 788.45/x
  3. Step 3: Cross multiply
    1,067.49x = 1,472.49 × 788.45
  4. Step 4: Simplify right side
    1,067.49x = 1,160,977.38
  5. Step 5: Solve for x
    x = 1,160,977.38/1,067.49
  6. Step 6: Final answer
    x = 1,087.58

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1.5x scale

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.