Home / 423,815.40-635,399.10-213,604.20

Finding the Fourth Proportional to 423,815.40, 635,399.10 and 213,604.20

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Solution

The fourth proportional to 423,815.40, 635,399.10 and 213,604.20 is: 320,243.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,815.40 : 635,399.10 = 213,604.20 : x
  2. Step 2: Convert to fraction form
    423,815.40/635,399.10 = 213,604.20/x
  3. Step 3: Cross multiply
    423,815.40x = 635,399.10 × 213,604.20
  4. Step 4: Simplify right side
    423,815.40x = 135,723,916,436.22
  5. Step 5: Solve for x
    x = 135,723,916,436.22/423,815.40
  6. Step 6: Final answer
    x = 320,243.00

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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.