Home / 420,876,000.20-631,314,000.30-318,839,328.20

Finding the Fourth Proportional to 420,876,000.20, 631,314,000.30 and 318,839,328.20

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Solution

The fourth proportional to 420,876,000.20, 631,314,000.30 and 318,839,328.20 is: 478,258,992.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,876,000.20 : 631,314,000.30 = 318,839,328.20 : x
  2. Step 2: Convert to fraction form
    420,876,000.20/631,314,000.30 = 318,839,328.20/x
  3. Step 3: Cross multiply
    420,876,000.20x = 631,314,000.30 × 318,839,328.20
  4. Step 4: Simplify right side
    420,876,000.20x = 201,287,731,738,906,560
  5. Step 5: Solve for x
    x = 201,287,731,738,906,560/420,876,000.20
  6. Step 6: Final answer
    x = 478,258,992.30

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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.