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Finding the Fourth Proportional to 906.49, 1,359.96 and 257.23

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Solution

The fourth proportional to 906.49, 1,359.96 and 257.23 is: 385.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.49 : 1,359.96 = 257.23 : x
  2. Step 2: Convert to fraction form
    906.49/1,359.96 = 257.23/x
  3. Step 3: Cross multiply
    906.49x = 1,359.96 × 257.23
  4. Step 4: Simplify right side
    906.49x = 349,822.51
  5. Step 5: Solve for x
    x = 349,822.51/906.49
  6. Step 6: Final answer
    x = 385.91

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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.