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Finding the Fourth Proportional to 316,403,999.20, 474,605,998.80 and 316,403,999.20

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Solution

The fourth proportional to 316,403,999.20, 474,605,998.80 and 316,403,999.20 is: 474,605,998.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,403,999.20 : 474,605,998.80 = 316,403,999.20 : x
  2. Step 2: Convert to fraction form
    316,403,999.20/474,605,998.80 = 316,403,999.20/x
  3. Step 3: Cross multiply
    316,403,999.20x = 474,605,998.80 × 316,403,999.20
  4. Step 4: Simplify right side
    316,403,999.20x = 150,167,236,064,630,400
  5. Step 5: Solve for x
    x = 150,167,236,064,630,400/316,403,999.20
  6. Step 6: Final answer
    x = 474,605,998.80

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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.