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Finding the Fourth Proportional to 686,039.02, 946,803.94 and 395,661.92

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Solution

The fourth proportional to 686,039.02, 946,803.94 and 395,661.92 is: 546,053.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,039.02 : 946,803.94 = 395,661.92 : x
  2. Step 2: Convert to fraction form
    686,039.02/946,803.94 = 395,661.92/x
  3. Step 3: Cross multiply
    686,039.02x = 946,803.94 × 395,661.92
  4. Step 4: Simplify right side
    686,039.02x = 374,614,259,040.79
  5. Step 5: Solve for x
    x = 374,614,259,040.79/686,039.02
  6. Step 6: Final answer
    x = 546,053.87

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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.