Home / 1,680.18-2,520.42-692.79

Finding the Fourth Proportional to 1,680.18, 2,520.42 and 692.79

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Solution

The fourth proportional to 1,680.18, 2,520.42 and 692.79 is: 1,039.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680.18 : 2,520.42 = 692.79 : x
  2. Step 2: Convert to fraction form
    1,680.18/2,520.42 = 692.79/x
  3. Step 3: Cross multiply
    1,680.18x = 2,520.42 × 692.79
  4. Step 4: Simplify right side
    1,680.18x = 1,746,121.77
  5. Step 5: Solve for x
    x = 1,746,121.77/1,680.18
  6. Step 6: Final answer
    x = 1,039.25

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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.