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Finding the Fourth Proportional to 903.11, 1,246.29 and 548.91

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Solution

The fourth proportional to 903.11, 1,246.29 and 548.91 is: 757.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.11 : 1,246.29 = 548.91 : x
  2. Step 2: Convert to fraction form
    903.11/1,246.29 = 548.91/x
  3. Step 3: Cross multiply
    903.11x = 1,246.29 × 548.91
  4. Step 4: Simplify right side
    903.11x = 684,101.04
  5. Step 5: Solve for x
    x = 684,101.04/903.11
  6. Step 6: Final answer
    x = 757.50

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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.