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Finding the Fourth Proportional to 476.35, 714.70 and 257.22

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Solution

The fourth proportional to 476.35, 714.70 and 257.22 is: 385.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.35 : 714.70 = 257.22 : x
  2. Step 2: Convert to fraction form
    476.35/714.70 = 257.22/x
  3. Step 3: Cross multiply
    476.35x = 714.70 × 257.22
  4. Step 4: Simplify right side
    476.35x = 183,830.27
  5. Step 5: Solve for x
    x = 183,830.27/476.35
  6. Step 6: Final answer
    x = 385.92

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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.