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Finding the Fourth Proportional to 642,803.22, 964,212.39 and 243,336.60

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Solution

The fourth proportional to 642,803.22, 964,212.39 and 243,336.60 is: 365,007.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,803.22 : 964,212.39 = 243,336.60 : x
  2. Step 2: Convert to fraction form
    642,803.22/964,212.39 = 243,336.60/x
  3. Step 3: Cross multiply
    642,803.22x = 964,212.39 × 243,336.60
  4. Step 4: Simplify right side
    642,803.22x = 234,628,164,660.47
  5. Step 5: Solve for x
    x = 234,628,164,660.47/642,803.22
  6. Step 6: Final answer
    x = 365,007.76

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1.5x scale

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.