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Finding the Fourth Proportional to 287.11, 428.21 and 244.06

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Solution

The fourth proportional to 287.11, 428.21 and 244.06 is: 364.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.11 : 428.21 = 244.06 : x
  2. Step 2: Convert to fraction form
    287.11/428.21 = 244.06/x
  3. Step 3: Cross multiply
    287.11x = 428.21 × 244.06
  4. Step 4: Simplify right side
    287.11x = 104,508.93
  5. Step 5: Solve for x
    x = 104,508.93/287.11
  6. Step 6: Final answer
    x = 364.00

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.