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Finding the Fourth Proportional to 894.30, 1,234.05 and 521.27

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Solution

The fourth proportional to 894.30, 1,234.05 and 521.27 is: 719.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    894.30 : 1,234.05 = 521.27 : x
  2. Step 2: Convert to fraction form
    894.30/1,234.05 = 521.27/x
  3. Step 3: Cross multiply
    894.30x = 1,234.05 × 521.27
  4. Step 4: Simplify right side
    894.30x = 643,273.24
  5. Step 5: Solve for x
    x = 643,273.24/894.30
  6. Step 6: Final answer
    x = 719.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.