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Finding the Fourth Proportional to 714.63, 1,072.46 and 349.68

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Solution

The fourth proportional to 714.63, 1,072.46 and 349.68 is: 524.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.63 : 1,072.46 = 349.68 : x
  2. Step 2: Convert to fraction form
    714.63/1,072.46 = 349.68/x
  3. Step 3: Cross multiply
    714.63x = 1,072.46 × 349.68
  4. Step 4: Simplify right side
    714.63x = 375,017.81
  5. Step 5: Solve for x
    x = 375,017.81/714.63
  6. Step 6: Final answer
    x = 524.77

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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.