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Finding the Fourth Proportional to 894.36, 1,233.70 and 521.30

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Solution

The fourth proportional to 894.36, 1,233.70 and 521.30 is: 719.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    894.36 : 1,233.70 = 521.30 : x
  2. Step 2: Convert to fraction form
    894.36/1,233.70 = 521.30/x
  3. Step 3: Cross multiply
    894.36x = 1,233.70 × 521.30
  4. Step 4: Simplify right side
    894.36x = 643,125.58
  5. Step 5: Solve for x
    x = 643,125.58/894.36
  6. Step 6: Final answer
    x = 719.09

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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.