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Finding the Fourth Proportional to 425,412,073.80, 638,118,110.70 and 209,973,328.20

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Solution

The fourth proportional to 425,412,073.80, 638,118,110.70 and 209,973,328.20 is: 314,959,992.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,412,073.80 : 638,118,110.70 = 209,973,328.20 : x
  2. Step 2: Convert to fraction form
    425,412,073.80/638,118,110.70 = 209,973,328.20/x
  3. Step 3: Cross multiply
    425,412,073.80x = 638,118,110.70 × 209,973,328.20
  4. Step 4: Simplify right side
    425,412,073.80x = 133,987,783,488,375,040
  5. Step 5: Solve for x
    x = 133,987,783,488,375,040/425,412,073.80
  6. Step 6: Final answer
    x = 314,959,992.30

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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.