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Finding the Fourth Proportional to 903.44, 1,246 and 638.77

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Solution

The fourth proportional to 903.44, 1,246 and 638.77 is: 880.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.44 : 1,246 = 638.77 : x
  2. Step 2: Convert to fraction form
    903.44/1,246 = 638.77/x
  3. Step 3: Cross multiply
    903.44x = 1,246 × 638.77
  4. Step 4: Simplify right side
    903.44x = 795,907.42
  5. Step 5: Solve for x
    x = 795,907.42/903.44
  6. Step 6: Final answer
    x = 880.97

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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.