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Finding the Fourth Proportional to 714,824.66, 986,469.33 and 388,137.49

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Solution

The fourth proportional to 714,824.66, 986,469.33 and 388,137.49 is: 535,635.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,824.66 : 986,469.33 = 388,137.49 : x
  2. Step 2: Convert to fraction form
    714,824.66/986,469.33 = 388,137.49/x
  3. Step 3: Cross multiply
    714,824.66x = 986,469.33 × 388,137.49
  4. Step 4: Simplify right side
    714,824.66x = 382,885,728,697.52
  5. Step 5: Solve for x
    x = 382,885,728,697.52/714,824.66
  6. Step 6: Final answer
    x = 535,635.87

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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.