Home / 419,905,090.20-630,172,563.30-215,327,861.40

Finding the Fourth Proportional to 419,905,090.20, 630,172,563.30 and 215,327,861.40

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Solution

The fourth proportional to 419,905,090.20, 630,172,563.30 and 215,327,861.40 is: 323,153,287.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,905,090.20 : 630,172,563.30 = 215,327,861.40 : x
  2. Step 2: Convert to fraction form
    419,905,090.20/630,172,563.30 = 215,327,861.40/x
  3. Step 3: Cross multiply
    419,905,090.20x = 630,172,563.30 × 215,327,861.40
  4. Step 4: Simplify right side
    419,905,090.20x = 135,693,710,368,345,120
  5. Step 5: Solve for x
    x = 135,693,710,368,345,120/419,905,090.20
  6. Step 6: Final answer
    x = 323,153,287.58

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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.