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Finding the Fourth Proportional to 842.01, 1,263.03 and 256.87

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Solution

The fourth proportional to 842.01, 1,263.03 and 256.87 is: 385.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.01 : 1,263.03 = 256.87 : x
  2. Step 2: Convert to fraction form
    842.01/1,263.03 = 256.87/x
  3. Step 3: Cross multiply
    842.01x = 1,263.03 × 256.87
  4. Step 4: Simplify right side
    842.01x = 324,434.52
  5. Step 5: Solve for x
    x = 324,434.52/842.01
  6. Step 6: Final answer
    x = 385.31

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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.