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Finding the Fourth Proportional to 903.08, 1,243.15 and 786.44

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Solution

The fourth proportional to 903.08, 1,243.15 and 786.44 is: 1,082.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.08 : 1,243.15 = 786.44 : x
  2. Step 2: Convert to fraction form
    903.08/1,243.15 = 786.44/x
  3. Step 3: Cross multiply
    903.08x = 1,243.15 × 786.44
  4. Step 4: Simplify right side
    903.08x = 977,664.03
  5. Step 5: Solve for x
    x = 977,664.03/903.08
  6. Step 6: Final answer
    x = 1,082.59

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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.