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Finding the Fourth Proportional to 382,991.60, 528,542.74 and 210,917.10

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Solution

The fourth proportional to 382,991.60, 528,542.74 and 210,917.10 is: 291,073.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,991.60 : 528,542.74 = 210,917.10 : x
  2. Step 2: Convert to fraction form
    382,991.60/528,542.74 = 210,917.10/x
  3. Step 3: Cross multiply
    382,991.60x = 528,542.74 × 210,917.10
  4. Step 4: Simplify right side
    382,991.60x = 111,478,701,946.85
  5. Step 5: Solve for x
    x = 111,478,701,946.85/382,991.60
  6. Step 6: Final answer
    x = 291,073.49

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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.