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Finding the Fourth Proportional to 454,999.70, 682,499.55 and 139,415.60

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Solution

The fourth proportional to 454,999.70, 682,499.55 and 139,415.60 is: 209,123.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    454,999.70 : 682,499.55 = 139,415.60 : x
  2. Step 2: Convert to fraction form
    454,999.70/682,499.55 = 139,415.60/x
  3. Step 3: Cross multiply
    454,999.70x = 682,499.55 × 139,415.60
  4. Step 4: Simplify right side
    454,999.70x = 95,151,084,262.98
  5. Step 5: Solve for x
    x = 95,151,084,262.98/454,999.70
  6. Step 6: Final answer
    x = 209,123.40

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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.