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Finding the Fourth Proportional to 698.91, 964.50 and 388.41

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Solution

The fourth proportional to 698.91, 964.50 and 388.41 is: 536.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.91 : 964.50 = 388.41 : x
  2. Step 2: Convert to fraction form
    698.91/964.50 = 388.41/x
  3. Step 3: Cross multiply
    698.91x = 964.50 × 388.41
  4. Step 4: Simplify right side
    698.91x = 374,621.45
  5. Step 5: Solve for x
    x = 374,621.45/698.91
  6. Step 6: Final answer
    x = 536.01

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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.