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Finding the Fourth Proportional to 379,640.40, 570,116.70 and 202,493.40

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Solution

The fourth proportional to 379,640.40, 570,116.70 and 202,493.40 is: 304,090.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,640.40 : 570,116.70 = 202,493.40 : x
  2. Step 2: Convert to fraction form
    379,640.40/570,116.70 = 202,493.40/x
  3. Step 3: Cross multiply
    379,640.40x = 570,116.70 × 202,493.40
  4. Step 4: Simplify right side
    379,640.40x = 115,444,868,979.78
  5. Step 5: Solve for x
    x = 115,444,868,979.78/379,640.40
  6. Step 6: Final answer
    x = 304,090.05

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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.