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Finding the Fourth Proportional to 903.06, 1,245.06 and 890.82

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Solution

The fourth proportional to 903.06, 1,245.06 and 890.82 is: 1,228.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.06 : 1,245.06 = 890.82 : x
  2. Step 2: Convert to fraction form
    903.06/1,245.06 = 890.82/x
  3. Step 3: Cross multiply
    903.06x = 1,245.06 × 890.82
  4. Step 4: Simplify right side
    903.06x = 1,109,124.35
  5. Step 5: Solve for x
    x = 1,109,124.35/903.06
  6. Step 6: Final answer
    x = 1,228.18

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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.