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Finding the Fourth Proportional to 685,795.84, 946,388.26 and 379,871.20

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Solution

The fourth proportional to 685,795.84, 946,388.26 and 379,871.20 is: 524,216.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,795.84 : 946,388.26 = 379,871.20 : x
  2. Step 2: Convert to fraction form
    685,795.84/946,388.26 = 379,871.20/x
  3. Step 3: Cross multiply
    685,795.84x = 946,388.26 × 379,871.20
  4. Step 4: Simplify right side
    685,795.84x = 359,505,643,992.11
  5. Step 5: Solve for x
    x = 359,505,643,992.11/685,795.84
  6. Step 6: Final answer
    x = 524,216.72

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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.