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Finding the Fourth Proportional to 603,740.80, 905,611.20 and 288,812.80

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Solution

The fourth proportional to 603,740.80, 905,611.20 and 288,812.80 is: 433,219.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,740.80 : 905,611.20 = 288,812.80 : x
  2. Step 2: Convert to fraction form
    603,740.80/905,611.20 = 288,812.80/x
  3. Step 3: Cross multiply
    603,740.80x = 905,611.20 × 288,812.80
  4. Step 4: Simplify right side
    603,740.80x = 261,552,106,383.36
  5. Step 5: Solve for x
    x = 261,552,106,383.36/603,740.80
  6. Step 6: Final answer
    x = 433,219.20

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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.