Home / 1,189.26-1,641.18-692.20

Finding the Fourth Proportional to 1,189.26, 1,641.18 and 692.20

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Solution

The fourth proportional to 1,189.26, 1,641.18 and 692.20 is: 955.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189.26 : 1,641.18 = 692.20 : x
  2. Step 2: Convert to fraction form
    1,189.26/1,641.18 = 692.20/x
  3. Step 3: Cross multiply
    1,189.26x = 1,641.18 × 692.20
  4. Step 4: Simplify right side
    1,189.26x = 1,136,024.80
  5. Step 5: Solve for x
    x = 1,136,024.80/1,189.26
  6. Step 6: Final answer
    x = 955.24

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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.