Home / 1,376.79-2,075.98-1,261.98

Finding the Fourth Proportional to 1,376.79, 2,075.98 and 1,261.98

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Solution

The fourth proportional to 1,376.79, 2,075.98 and 1,261.98 is: 1,902.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,376.79 : 2,075.98 = 1,261.98 : x
  2. Step 2: Convert to fraction form
    1,376.79/2,075.98 = 1,261.98/x
  3. Step 3: Cross multiply
    1,376.79x = 2,075.98 × 1,261.98
  4. Step 4: Simplify right side
    1,376.79x = 2,619,845.24
  5. Step 5: Solve for x
    x = 2,619,845.24/1,376.79
  6. Step 6: Final answer
    x = 1,902.86

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.