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Finding the Fourth Proportional to 393,679,408.40, 590,516,002.20 and 102,545,968.40

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Solution

The fourth proportional to 393,679,408.40, 590,516,002.20 and 102,545,968.40 is: 153,818,142.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,679,408.40 : 590,516,002.20 = 102,545,968.40 : x
  2. Step 2: Convert to fraction form
    393,679,408.40/590,516,002.20 = 102,545,968.40/x
  3. Step 3: Cross multiply
    393,679,408.40x = 590,516,002.20 × 102,545,968.40
  4. Step 4: Simplify right side
    393,679,408.40x = 60,555,035,301,295,536
  5. Step 5: Solve for x
    x = 60,555,035,301,295,536/393,679,408.40
  6. Step 6: Final answer
    x = 153,818,142.40

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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.