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Finding the Fourth Proportional to 655,842.25, 905,126.87 and 383,893.66

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Solution

The fourth proportional to 655,842.25, 905,126.87 and 383,893.66 is: 529,811.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,842.25 : 905,126.87 = 383,893.66 : x
  2. Step 2: Convert to fraction form
    655,842.25/905,126.87 = 383,893.66/x
  3. Step 3: Cross multiply
    655,842.25x = 905,126.87 × 383,893.66
  4. Step 4: Simplify right side
    655,842.25x = 347,472,468,979.79
  5. Step 5: Solve for x
    x = 347,472,468,979.79/655,842.25
  6. Step 6: Final answer
    x = 529,811.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.