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Finding the Fourth Proportional to 907.25, 1,361.83 and 518.00

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Solution

The fourth proportional to 907.25, 1,361.83 and 518.00 is: 777.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.25 : 1,361.83 = 518.00 : x
  2. Step 2: Convert to fraction form
    907.25/1,361.83 = 518.00/x
  3. Step 3: Cross multiply
    907.25x = 1,361.83 × 518.00
  4. Step 4: Simplify right side
    907.25x = 705,420.81
  5. Step 5: Solve for x
    x = 705,420.81/907.25
  6. Step 6: Final answer
    x = 777.54

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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.