Home / 427,580.28-641,174.10-123,905.40

Finding the Fourth Proportional to 427,580.28, 641,174.10 and 123,905.40

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Solution

The fourth proportional to 427,580.28, 641,174.10 and 123,905.40 is: 185,801.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,580.28 : 641,174.10 = 123,905.40 : x
  2. Step 2: Convert to fraction form
    427,580.28/641,174.10 = 123,905.40/x
  3. Step 3: Cross multiply
    427,580.28x = 641,174.10 × 123,905.40
  4. Step 4: Simplify right side
    427,580.28x = 79,444,933,330.14
  5. Step 5: Solve for x
    x = 79,444,933,330.14/427,580.28
  6. Step 6: Final answer
    x = 185,801.21

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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.