Home / 425,665,407.85-638,191,675.09-261,564,121.88

Finding the Fourth Proportional to 425,665,407.85, 638,191,675.09 and 261,564,121.88

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Solution

The fourth proportional to 425,665,407.85, 638,191,675.09 and 261,564,121.88 is: 392,157,882.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,665,407.85 : 638,191,675.09 = 261,564,121.88 : x
  2. Step 2: Convert to fraction form
    425,665,407.85/638,191,675.09 = 261,564,121.88/x
  3. Step 3: Cross multiply
    425,665,407.85x = 638,191,675.09 × 261,564,121.88
  4. Step 4: Simplify right side
    425,665,407.85x = 166,928,045,085,410,272
  5. Step 5: Solve for x
    x = 166,928,045,085,410,272/425,665,407.85
  6. Step 6: Final answer
    x = 392,157,882.71

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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.