Home / 392,834,819.12-542,100,187.32-216,622,727.60

Finding the Fourth Proportional to 392,834,819.12, 542,100,187.32 and 216,622,727.60

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Solution

The fourth proportional to 392,834,819.12, 542,100,187.32 and 216,622,727.60 is: 298,932,822.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,834,819.12 : 542,100,187.32 = 216,622,727.60 : x
  2. Step 2: Convert to fraction form
    392,834,819.12/542,100,187.32 = 216,622,727.60/x
  3. Step 3: Cross multiply
    392,834,819.12x = 542,100,187.32 × 216,622,727.60
  4. Step 4: Simplify right side
    392,834,819.12x = 117,431,221,209,729,344
  5. Step 5: Solve for x
    x = 117,431,221,209,729,344/392,834,819.12
  6. Step 6: Final answer
    x = 298,932,822.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.