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Finding the Fourth Proportional to 371,387.34, 512,513.10 and 201,621.42

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Solution

The fourth proportional to 371,387.34, 512,513.10 and 201,621.42 is: 278,236.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,387.34 : 512,513.10 = 201,621.42 : x
  2. Step 2: Convert to fraction form
    371,387.34/512,513.10 = 201,621.42/x
  3. Step 3: Cross multiply
    371,387.34x = 512,513.10 × 201,621.42
  4. Step 4: Simplify right side
    371,387.34x = 103,333,618,990.60
  5. Step 5: Solve for x
    x = 103,333,618,990.60/371,387.34
  6. Step 6: Final answer
    x = 278,236.78

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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.