Home / 3,075.45-4,244.10-1,678.20

Finding the Fourth Proportional to 3,075.45, 4,244.10 and 1,678.20

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Solution

The fourth proportional to 3,075.45, 4,244.10 and 1,678.20 is: 2,315.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,075.45 : 4,244.10 = 1,678.20 : x
  2. Step 2: Convert to fraction form
    3,075.45/4,244.10 = 1,678.20/x
  3. Step 3: Cross multiply
    3,075.45x = 4,244.10 × 1,678.20
  4. Step 4: Simplify right side
    3,075.45x = 7,122,448.62
  5. Step 5: Solve for x
    x = 7,122,448.62/3,075.45
  6. Step 6: Final answer
    x = 2,315.90

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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.