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Finding the Fourth Proportional to 685,889.97, 946,518.21 and 379,965.84

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Solution

The fourth proportional to 685,889.97, 946,518.21 and 379,965.84 is: 524,347.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,889.97 : 946,518.21 = 379,965.84 : x
  2. Step 2: Convert to fraction form
    685,889.97/946,518.21 = 379,965.84/x
  3. Step 3: Cross multiply
    685,889.97x = 946,518.21 × 379,965.84
  4. Step 4: Simplify right side
    685,889.97x = 359,644,586,737.95
  5. Step 5: Solve for x
    x = 359,644,586,737.95/685,889.97
  6. Step 6: Final answer
    x = 524,347.35

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1.5x scale

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.