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Finding the Fourth Proportional to 476.57, 714.12 and 321.89

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Solution

The fourth proportional to 476.57, 714.12 and 321.89 is: 482.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.57 : 714.12 = 321.89 : x
  2. Step 2: Convert to fraction form
    476.57/714.12 = 321.89/x
  3. Step 3: Cross multiply
    476.57x = 714.12 × 321.89
  4. Step 4: Simplify right side
    476.57x = 229,868.09
  5. Step 5: Solve for x
    x = 229,868.09/476.57
  6. Step 6: Final answer
    x = 482.34

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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.