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Finding the Fourth Proportional to 906.68, 1,360.14 and 257.43

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Solution

The fourth proportional to 906.68, 1,360.14 and 257.43 is: 386.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.68 : 1,360.14 = 257.43 : x
  2. Step 2: Convert to fraction form
    906.68/1,360.14 = 257.43/x
  3. Step 3: Cross multiply
    906.68x = 1,360.14 × 257.43
  4. Step 4: Simplify right side
    906.68x = 350,140.84
  5. Step 5: Solve for x
    x = 350,140.84/906.68
  6. Step 6: Final answer
    x = 386.18

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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.