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Finding the Fourth Proportional to 385,474.80, 578,212.20 and 259,503.60

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Solution

The fourth proportional to 385,474.80, 578,212.20 and 259,503.60 is: 389,255.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,474.80 : 578,212.20 = 259,503.60 : x
  2. Step 2: Convert to fraction form
    385,474.80/578,212.20 = 259,503.60/x
  3. Step 3: Cross multiply
    385,474.80x = 578,212.20 × 259,503.60
  4. Step 4: Simplify right side
    385,474.80x = 150,048,147,463.92
  5. Step 5: Solve for x
    x = 150,048,147,463.92/385,474.80
  6. Step 6: Final answer
    x = 389,255.40

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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.