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Finding the Fourth Proportional to 393,662,817.60, 590,494,226.40 and 291,626,145.60

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Solution

The fourth proportional to 393,662,817.60, 590,494,226.40 and 291,626,145.60 is: 437,439,218.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,662,817.60 : 590,494,226.40 = 291,626,145.60 : x
  2. Step 2: Convert to fraction form
    393,662,817.60/590,494,226.40 = 291,626,145.60/x
  3. Step 3: Cross multiply
    393,662,817.60x = 590,494,226.40 × 291,626,145.60
  4. Step 4: Simplify right side
    393,662,817.60x = 172,203,555,244,085,760
  5. Step 5: Solve for x
    x = 172,203,555,244,085,760/393,662,817.60
  6. Step 6: Final answer
    x = 437,439,218.40

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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.