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Finding the Fourth Proportional to 853.01, 1,281.06 and 787.94

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Solution

The fourth proportional to 853.01, 1,281.06 and 787.94 is: 1,183.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    853.01 : 1,281.06 = 787.94 : x
  2. Step 2: Convert to fraction form
    853.01/1,281.06 = 787.94/x
  3. Step 3: Cross multiply
    853.01x = 1,281.06 × 787.94
  4. Step 4: Simplify right side
    853.01x = 1,009,392.01
  5. Step 5: Solve for x
    x = 1,009,392.01/853.01
  6. Step 6: Final answer
    x = 1,183.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.