Home / 2,075.40-3,113.46-688.80

Finding the Fourth Proportional to 2,075.40, 3,113.46 and 688.80

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Solution

The fourth proportional to 2,075.40, 3,113.46 and 688.80 is: 1,033.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,075.40 : 3,113.46 = 688.80 : x
  2. Step 2: Convert to fraction form
    2,075.40/3,113.46 = 688.80/x
  3. Step 3: Cross multiply
    2,075.40x = 3,113.46 × 688.80
  4. Step 4: Simplify right side
    2,075.40x = 2,144,551.25
  5. Step 5: Solve for x
    x = 2,144,551.25/2,075.40
  6. Step 6: Final answer
    x = 1,033.32

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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.