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Finding the Fourth Proportional to 5,559.78, 7,672.44 and 3,075.78

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Solution

The fourth proportional to 5,559.78, 7,672.44 and 3,075.78 is: 4,244.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,559.78 : 7,672.44 = 3,075.78 : x
  2. Step 2: Convert to fraction form
    5,559.78/7,672.44 = 3,075.78/x
  3. Step 3: Cross multiply
    5,559.78x = 7,672.44 × 3,075.78
  4. Step 4: Simplify right side
    5,559.78x = 23,598,737.50
  5. Step 5: Solve for x
    x = 23,598,737.50/5,559.78
  6. Step 6: Final answer
    x = 4,244.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.