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Finding the Fourth Proportional to 714.87, 1,072.89 and 349.95

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Solution

The fourth proportional to 714.87, 1,072.89 and 349.95 is: 525.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.87 : 1,072.89 = 349.95 : x
  2. Step 2: Convert to fraction form
    714.87/1,072.89 = 349.95/x
  3. Step 3: Cross multiply
    714.87x = 1,072.89 × 349.95
  4. Step 4: Simplify right side
    714.87x = 375,457.86
  5. Step 5: Solve for x
    x = 375,457.86/714.87
  6. Step 6: Final answer
    x = 525.21

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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.