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Finding the Fourth Proportional to 906.18, 1,249.74 and 783.06

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Solution

The fourth proportional to 906.18, 1,249.74 and 783.06 is: 1,079.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.18 : 1,249.74 = 783.06 : x
  2. Step 2: Convert to fraction form
    906.18/1,249.74 = 783.06/x
  3. Step 3: Cross multiply
    906.18x = 1,249.74 × 783.06
  4. Step 4: Simplify right side
    906.18x = 978,621.40
  5. Step 5: Solve for x
    x = 978,621.40/906.18
  6. Step 6: Final answer
    x = 1,079.94

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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.