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Finding the Fourth Proportional to 494,322.75, 681,505.65 and 392,685.57

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Solution

The fourth proportional to 494,322.75, 681,505.65 and 392,685.57 is: 541,381.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,322.75 : 681,505.65 = 392,685.57 : x
  2. Step 2: Convert to fraction form
    494,322.75/681,505.65 = 392,685.57/x
  3. Step 3: Cross multiply
    494,322.75x = 681,505.65 × 392,685.57
  4. Step 4: Simplify right side
    494,322.75x = 267,617,434,628.47
  5. Step 5: Solve for x
    x = 267,617,434,628.47/494,322.75
  6. Step 6: Final answer
    x = 541,381.99

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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.