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Finding the Fourth Proportional to 637,999.20, 956,998.80 and 322,415.10

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Solution

The fourth proportional to 637,999.20, 956,998.80 and 322,415.10 is: 483,622.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    637,999.20 : 956,998.80 = 322,415.10 : x
  2. Step 2: Convert to fraction form
    637,999.20/956,998.80 = 322,415.10/x
  3. Step 3: Cross multiply
    637,999.20x = 956,998.80 × 322,415.10
  4. Step 4: Simplify right side
    637,999.20x = 308,550,863,801.88
  5. Step 5: Solve for x
    x = 308,550,863,801.88/637,999.20
  6. Step 6: Final answer
    x = 483,622.65

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Similar ratio
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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.