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Finding the Fourth Proportional to 842.03, 1,261.64 and 425.01

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Solution

The fourth proportional to 842.03, 1,261.64 and 425.01 is: 636.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.03 : 1,261.64 = 425.01 : x
  2. Step 2: Convert to fraction form
    842.03/1,261.64 = 425.01/x
  3. Step 3: Cross multiply
    842.03x = 1,261.64 × 425.01
  4. Step 4: Simplify right side
    842.03x = 536,209.62
  5. Step 5: Solve for x
    x = 536,209.62/842.03
  6. Step 6: Final answer
    x = 636.81

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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.