Home / 513,215,999.90-769,823,999.85-461,259,878.30

Finding the Fourth Proportional to 513,215,999.90, 769,823,999.85 and 461,259,878.30

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Solution

The fourth proportional to 513,215,999.90, 769,823,999.85 and 461,259,878.30 is: 691,889,817.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,215,999.90 : 769,823,999.85 = 461,259,878.30 : x
  2. Step 2: Convert to fraction form
    513,215,999.90/769,823,999.85 = 461,259,878.30/x
  3. Step 3: Cross multiply
    513,215,999.90x = 769,823,999.85 × 461,259,878.30
  4. Step 4: Simplify right side
    513,215,999.90x = 355,088,924,483,230,208
  5. Step 5: Solve for x
    x = 355,088,924,483,230,208/513,215,999.90
  6. Step 6: Final answer
    x = 691,889,817.45

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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.