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Finding the Fourth Proportional to 453.84, 625.20 and 388.32

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Solution

The fourth proportional to 453.84, 625.20 and 388.32 is: 534.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.84 : 625.20 = 388.32 : x
  2. Step 2: Convert to fraction form
    453.84/625.20 = 388.32/x
  3. Step 3: Cross multiply
    453.84x = 625.20 × 388.32
  4. Step 4: Simplify right side
    453.84x = 242,777.66
  5. Step 5: Solve for x
    x = 242,777.66/453.84
  6. Step 6: Final answer
    x = 534.94

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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.