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Finding the Fourth Proportional to 840.54, 1,260.93 and 263.22

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Solution

The fourth proportional to 840.54, 1,260.93 and 263.22 is: 394.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    840.54 : 1,260.93 = 263.22 : x
  2. Step 2: Convert to fraction form
    840.54/1,260.93 = 263.22/x
  3. Step 3: Cross multiply
    840.54x = 1,260.93 × 263.22
  4. Step 4: Simplify right side
    840.54x = 331,901.99
  5. Step 5: Solve for x
    x = 331,901.99/840.54
  6. Step 6: Final answer
    x = 394.87

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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.