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Finding the Fourth Proportional to 607,997.20, 911,995.80 and 328,061.20

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Solution

The fourth proportional to 607,997.20, 911,995.80 and 328,061.20 is: 492,091.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,997.20 : 911,995.80 = 328,061.20 : x
  2. Step 2: Convert to fraction form
    607,997.20/911,995.80 = 328,061.20/x
  3. Step 3: Cross multiply
    607,997.20x = 911,995.80 × 328,061.20
  4. Step 4: Simplify right side
    607,997.20x = 299,190,436,542.96
  5. Step 5: Solve for x
    x = 299,190,436,542.96/607,997.20
  6. Step 6: Final answer
    x = 492,091.80

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1.5x scale

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.