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Finding the Fourth Proportional to 392,021,611.60, 588,028,430.64 and 100,887,602.80

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Solution

The fourth proportional to 392,021,611.60, 588,028,430.64 and 100,887,602.80 is: 151,330,378.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,021,611.60 : 588,028,430.64 = 100,887,602.80 : x
  2. Step 2: Convert to fraction form
    392,021,611.60/588,028,430.64 = 100,887,602.80/x
  3. Step 3: Cross multiply
    392,021,611.60x = 588,028,430.64 × 100,887,602.80
  4. Step 4: Simplify right side
    392,021,611.60x = 59,324,778,745,515,664
  5. Step 5: Solve for x
    x = 59,324,778,745,515,664/392,021,611.60
  6. Step 6: Final answer
    x = 151,330,378.20

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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.