Home / 485,650,620.81-670,416,724.04-309,675,152.97

Finding the Fourth Proportional to 485,650,620.81, 670,416,724.04 and 309,675,152.97

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Solution

The fourth proportional to 485,650,620.81, 670,416,724.04 and 309,675,152.97 is: 427,491,271.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,650,620.81 : 670,416,724.04 = 309,675,152.97 : x
  2. Step 2: Convert to fraction form
    485,650,620.81/670,416,724.04 = 309,675,152.97/x
  3. Step 3: Cross multiply
    485,650,620.81x = 670,416,724.04 × 309,675,152.97
  4. Step 4: Simplify right side
    485,650,620.81x = 207,611,401,569,184,896
  5. Step 5: Solve for x
    x = 207,611,401,569,184,896/485,650,620.81
  6. Step 6: Final answer
    x = 427,491,271.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.