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Finding the Fourth Proportional to 603,945.20, 905,917.80 and 324,009.20

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Solution

The fourth proportional to 603,945.20, 905,917.80 and 324,009.20 is: 486,013.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,945.20 : 905,917.80 = 324,009.20 : x
  2. Step 2: Convert to fraction form
    603,945.20/905,917.80 = 324,009.20/x
  3. Step 3: Cross multiply
    603,945.20x = 905,917.80 × 324,009.20
  4. Step 4: Simplify right side
    603,945.20x = 293,525,701,643.76
  5. Step 5: Solve for x
    x = 293,525,701,643.76/603,945.20
  6. Step 6: Final answer
    x = 486,013.80

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Double scale
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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.