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Finding the Fourth Proportional to 791,728,859.60, 1,187,593,289.40 and 217,300,187.60

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Solution

The fourth proportional to 791,728,859.60, 1,187,593,289.40 and 217,300,187.60 is: 325,950,281.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    791,728,859.60 : 1,187,593,289.40 = 217,300,187.60 : x
  2. Step 2: Convert to fraction form
    791,728,859.60/1,187,593,289.40 = 217,300,187.60/x
  3. Step 3: Cross multiply
    791,728,859.60x = 1,187,593,289.40 × 217,300,187.60
  4. Step 4: Simplify right side
    791,728,859.60x = 258,064,244,579,121,120
  5. Step 5: Solve for x
    x = 258,064,244,579,121,120/791,728,859.60
  6. Step 6: Final answer
    x = 325,950,281.40

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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.