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Finding the Fourth Proportional to 393,661,808.10, 590,492,712.15 and 163,795,860.90

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Solution

The fourth proportional to 393,661,808.10, 590,492,712.15 and 163,795,860.90 is: 245,693,791.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,661,808.10 : 590,492,712.15 = 163,795,860.90 : x
  2. Step 2: Convert to fraction form
    393,661,808.10/590,492,712.15 = 163,795,860.90/x
  3. Step 3: Cross multiply
    393,661,808.10x = 590,492,712.15 × 163,795,860.90
  4. Step 4: Simplify right side
    393,661,808.10x = 96,720,262,141,785,136
  5. Step 5: Solve for x
    x = 96,720,262,141,785,136/393,661,808.10
  6. Step 6: Final answer
    x = 245,693,791.35

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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.