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Finding the Fourth Proportional to 840.04, 1,258.96 and 635.92

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Solution

The fourth proportional to 840.04, 1,258.96 and 635.92 is: 953.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    840.04 : 1,258.96 = 635.92 : x
  2. Step 2: Convert to fraction form
    840.04/1,258.96 = 635.92/x
  3. Step 3: Cross multiply
    840.04x = 1,258.96 × 635.92
  4. Step 4: Simplify right side
    840.04x = 800,597.84
  5. Step 5: Solve for x
    x = 800,597.84/840.04
  6. Step 6: Final answer
    x = 953.05

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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.