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Finding the Fourth Proportional to 547,690.43, 820,801.32 and 426,257.64

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Solution

The fourth proportional to 547,690.43, 820,801.32 and 426,257.64 is: 638,814.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,690.43 : 820,801.32 = 426,257.64 : x
  2. Step 2: Convert to fraction form
    547,690.43/820,801.32 = 426,257.64/x
  3. Step 3: Cross multiply
    547,690.43x = 820,801.32 × 426,257.64
  4. Step 4: Simplify right side
    547,690.43x = 349,872,831,973.62
  5. Step 5: Solve for x
    x = 349,872,831,973.62/547,690.43
  6. Step 6: Final answer
    x = 638,814.94

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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.