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Finding the Fourth Proportional to 660,228.57, 989,774.64 and 280,801.89

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Solution

The fourth proportional to 660,228.57, 989,774.64 and 280,801.89 is: 420,961.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,228.57 : 989,774.64 = 280,801.89 : x
  2. Step 2: Convert to fraction form
    660,228.57/989,774.64 = 280,801.89/x
  3. Step 3: Cross multiply
    660,228.57x = 989,774.64 × 280,801.89
  4. Step 4: Simplify right side
    660,228.57x = 277,930,589,586.07
  5. Step 5: Solve for x
    x = 277,930,589,586.07/660,228.57
  6. Step 6: Final answer
    x = 420,961.17

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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.