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Finding the Fourth Proportional to 351,771.71, 528,363.59 and 209,893.80

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Solution

The fourth proportional to 351,771.71, 528,363.59 and 209,893.80 is: 315,261.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,771.71 : 528,363.59 = 209,893.80 : x
  2. Step 2: Convert to fraction form
    351,771.71/528,363.59 = 209,893.80/x
  3. Step 3: Cross multiply
    351,771.71x = 528,363.59 × 209,893.80
  4. Step 4: Simplify right side
    351,771.71x = 110,900,240,637.27
  5. Step 5: Solve for x
    x = 110,900,240,637.27/351,771.71
  6. Step 6: Final answer
    x = 315,261.97

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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.