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Finding the Fourth Proportional to 678,009.50, 935,652.39 and 372,087.62

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Solution

The fourth proportional to 678,009.50, 935,652.39 and 372,087.62 is: 513,480.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,009.50 : 935,652.39 = 372,087.62 : x
  2. Step 2: Convert to fraction form
    678,009.50/935,652.39 = 372,087.62/x
  3. Step 3: Cross multiply
    678,009.50x = 935,652.39 × 372,087.62
  4. Step 4: Simplify right side
    678,009.50x = 348,144,670,942.41
  5. Step 5: Solve for x
    x = 348,144,670,942.41/678,009.50
  6. Step 6: Final answer
    x = 513,480.52

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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.