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Finding the Fourth Proportional to 393,985,443.40, 590,978,165.10 and 393,985,443.40

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Solution

The fourth proportional to 393,985,443.40, 590,978,165.10 and 393,985,443.40 is: 590,978,165.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,985,443.40 : 590,978,165.10 = 393,985,443.40 : x
  2. Step 2: Convert to fraction form
    393,985,443.40/590,978,165.10 = 393,985,443.40/x
  3. Step 3: Cross multiply
    393,985,443.40x = 590,978,165.10 × 393,985,443.40
  4. Step 4: Simplify right side
    393,985,443.40x = 232,836,794,416,641,888
  5. Step 5: Solve for x
    x = 232,836,794,416,641,888/393,985,443.40
  6. Step 6: Final answer
    x = 590,978,165.10

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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.