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Finding the Fourth Proportional to 907.45, 1,361.18 and 258.19

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Solution

The fourth proportional to 907.45, 1,361.18 and 258.19 is: 387.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.45 : 1,361.18 = 258.19 : x
  2. Step 2: Convert to fraction form
    907.45/1,361.18 = 258.19/x
  3. Step 3: Cross multiply
    907.45x = 1,361.18 × 258.19
  4. Step 4: Simplify right side
    907.45x = 351,439.58
  5. Step 5: Solve for x
    x = 351,439.58/907.45
  6. Step 6: Final answer
    x = 387.28

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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.