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Finding the Fourth Proportional to 504.54, 756.84 and 428.04

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Solution

The fourth proportional to 504.54, 756.84 and 428.04 is: 642.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    504.54 : 756.84 = 428.04 : x
  2. Step 2: Convert to fraction form
    504.54/756.84 = 428.04/x
  3. Step 3: Cross multiply
    504.54x = 756.84 × 428.04
  4. Step 4: Simplify right side
    504.54x = 323,957.79
  5. Step 5: Solve for x
    x = 323,957.79/504.54
  6. Step 6: Final answer
    x = 642.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.