Home / 426,309.16-639,474-201,774.28

Finding the Fourth Proportional to 426,309.16, 639,474 and 201,774.28

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Solution

The fourth proportional to 426,309.16, 639,474 and 201,774.28 is: 302,666.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,309.16 : 639,474 = 201,774.28 : x
  2. Step 2: Convert to fraction form
    426,309.16/639,474 = 201,774.28/x
  3. Step 3: Cross multiply
    426,309.16x = 639,474 × 201,774.28
  4. Step 4: Simplify right side
    426,309.16x = 129,029,405,928.72
  5. Step 5: Solve for x
    x = 129,029,405,928.72/426,309.16
  6. Step 6: Final answer
    x = 302,666.28

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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.