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Finding the Fourth Proportional to 378,250.40, 521,982.96 and 208,484.12

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Solution

The fourth proportional to 378,250.40, 521,982.96 and 208,484.12 is: 287,706.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,250.40 : 521,982.96 = 208,484.12 : x
  2. Step 2: Convert to fraction form
    378,250.40/521,982.96 = 208,484.12/x
  3. Step 3: Cross multiply
    378,250.40x = 521,982.96 × 208,484.12
  4. Step 4: Simplify right side
    378,250.40x = 108,825,158,070.60
  5. Step 5: Solve for x
    x = 108,825,158,070.60/378,250.40
  6. Step 6: Final answer
    x = 287,706.66

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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.