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Finding the Fourth Proportional to 714.97, 1,074.25 and 455.09

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Solution

The fourth proportional to 714.97, 1,074.25 and 455.09 is: 683.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.97 : 1,074.25 = 455.09 : x
  2. Step 2: Convert to fraction form
    714.97/1,074.25 = 455.09/x
  3. Step 3: Cross multiply
    714.97x = 1,074.25 × 455.09
  4. Step 4: Simplify right side
    714.97x = 488,875.06
  5. Step 5: Solve for x
    x = 488,875.06/714.97
  6. Step 6: Final answer
    x = 683.77

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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.