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Finding the Fourth Proportional to 608,769.20, 913,153.80 and 419,812.40

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Solution

The fourth proportional to 608,769.20, 913,153.80 and 419,812.40 is: 629,718.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,769.20 : 913,153.80 = 419,812.40 : x
  2. Step 2: Convert to fraction form
    608,769.20/913,153.80 = 419,812.40/x
  3. Step 3: Cross multiply
    608,769.20x = 913,153.80 × 419,812.40
  4. Step 4: Simplify right side
    608,769.20x = 383,353,288,347.12
  5. Step 5: Solve for x
    x = 383,353,288,347.12/608,769.20
  6. Step 6: Final answer
    x = 629,718.60

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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.