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Finding the Fourth Proportional to 407,639.70, 611,480.85 and 123,323.10

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Solution

The fourth proportional to 407,639.70, 611,480.85 and 123,323.10 is: 184,991.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,639.70 : 611,480.85 = 123,323.10 : x
  2. Step 2: Convert to fraction form
    407,639.70/611,480.85 = 123,323.10/x
  3. Step 3: Cross multiply
    407,639.70x = 611,480.85 × 123,323.10
  4. Step 4: Simplify right side
    407,639.70x = 75,409,714,012.64
  5. Step 5: Solve for x
    x = 75,409,714,012.64/407,639.70
  6. Step 6: Final answer
    x = 184,991.09

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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.