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Finding the Fourth Proportional to 476.65, 714.36 and 256.73

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Solution

The fourth proportional to 476.65, 714.36 and 256.73 is: 384.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.65 : 714.36 = 256.73 : x
  2. Step 2: Convert to fraction form
    476.65/714.36 = 256.73/x
  3. Step 3: Cross multiply
    476.65x = 714.36 × 256.73
  4. Step 4: Simplify right side
    476.65x = 183,400.39
  5. Step 5: Solve for x
    x = 183,400.39/476.65
  6. Step 6: Final answer
    x = 384.77

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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.