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Finding the Fourth Proportional to 476.88, 714.78 and 328.74

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Solution

The fourth proportional to 476.88, 714.78 and 328.74 is: 492.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.88 : 714.78 = 328.74 : x
  2. Step 2: Convert to fraction form
    476.88/714.78 = 328.74/x
  3. Step 3: Cross multiply
    476.88x = 714.78 × 328.74
  4. Step 4: Simplify right side
    476.88x = 234,976.78
  5. Step 5: Solve for x
    x = 234,976.78/476.88
  6. Step 6: Final answer
    x = 492.74

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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.