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Finding the Fourth Proportional to 714.86, 1,072.34 and 228.25

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Solution

The fourth proportional to 714.86, 1,072.34 and 228.25 is: 342.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.86 : 1,072.34 = 228.25 : x
  2. Step 2: Convert to fraction form
    714.86/1,072.34 = 228.25/x
  3. Step 3: Cross multiply
    714.86x = 1,072.34 × 228.25
  4. Step 4: Simplify right side
    714.86x = 244,762.66
  5. Step 5: Solve for x
    x = 244,762.66/714.86
  6. Step 6: Final answer
    x = 342.39

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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.