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Finding the Fourth Proportional to 920,604, 1,380,923.28 and 255,773.28

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Solution

The fourth proportional to 920,604, 1,380,923.28 and 255,773.28 is: 383,664.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,604 : 1,380,923.28 = 255,773.28 : x
  2. Step 2: Convert to fraction form
    920,604/1,380,923.28 = 255,773.28/x
  3. Step 3: Cross multiply
    920,604x = 1,380,923.28 × 255,773.28
  4. Step 4: Simplify right side
    920,604x = 353,203,276,753.96
  5. Step 5: Solve for x
    x = 353,203,276,753.96/920,604
  6. Step 6: Final answer
    x = 383,664.72

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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.