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Finding the Fourth Proportional to 840.08, 1,259.94 and 284.73

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Solution

The fourth proportional to 840.08, 1,259.94 and 284.73 is: 427.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    840.08 : 1,259.94 = 284.73 : x
  2. Step 2: Convert to fraction form
    840.08/1,259.94 = 284.73/x
  3. Step 3: Cross multiply
    840.08x = 1,259.94 × 284.73
  4. Step 4: Simplify right side
    840.08x = 358,742.72
  5. Step 5: Solve for x
    x = 358,742.72/840.08
  6. Step 6: Final answer
    x = 427.04

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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.