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Finding the Fourth Proportional to 378,657.48, 522,543.78 and 208,887.96

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Solution

The fourth proportional to 378,657.48, 522,543.78 and 208,887.96 is: 288,263.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,657.48 : 522,543.78 = 208,887.96 : x
  2. Step 2: Convert to fraction form
    378,657.48/522,543.78 = 208,887.96/x
  3. Step 3: Cross multiply
    378,657.48x = 522,543.78 × 208,887.96
  4. Step 4: Simplify right side
    378,657.48x = 109,153,104,214.89
  5. Step 5: Solve for x
    x = 109,153,104,214.89/378,657.48
  6. Step 6: Final answer
    x = 288,263.43

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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.