Home / 3,075.12-4,609.80-1,126.80

Finding the Fourth Proportional to 3,075.12, 4,609.80 and 1,126.80

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Solution

The fourth proportional to 3,075.12, 4,609.80 and 1,126.80 is: 1,689.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,075.12 : 4,609.80 = 1,126.80 : x
  2. Step 2: Convert to fraction form
    3,075.12/4,609.80 = 1,126.80/x
  3. Step 3: Cross multiply
    3,075.12x = 4,609.80 × 1,126.80
  4. Step 4: Simplify right side
    3,075.12x = 5,194,322.64
  5. Step 5: Solve for x
    x = 5,194,322.64/3,075.12
  6. Step 6: Final answer
    x = 1,689.14

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1.5x scale

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.