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Finding the Fourth Proportional to 1,630, 2,249.40 and 894

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Solution

The fourth proportional to 1,630, 2,249.40 and 894 is: 1,233.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,630 : 2,249.40 = 894 : x
  2. Step 2: Convert to fraction form
    1,630/2,249.40 = 894/x
  3. Step 3: Cross multiply
    1,630x = 2,249.40 × 894
  4. Step 4: Simplify right side
    1,630x = 2,010,963.60
  5. Step 5: Solve for x
    x = 2,010,963.60/1,630
  6. Step 6: Final answer
    x = 1,233.72

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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.