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Finding the Fourth Proportional to 551,999.80, 827,999.70 and 315,803.80

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Solution

The fourth proportional to 551,999.80, 827,999.70 and 315,803.80 is: 473,705.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,999.80 : 827,999.70 = 315,803.80 : x
  2. Step 2: Convert to fraction form
    551,999.80/827,999.70 = 315,803.80/x
  3. Step 3: Cross multiply
    551,999.80x = 827,999.70 × 315,803.80
  4. Step 4: Simplify right side
    551,999.80x = 261,485,451,658.86
  5. Step 5: Solve for x
    x = 261,485,451,658.86/551,999.80
  6. Step 6: Final answer
    x = 473,705.70

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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.