Home / 1,189.25-1,641.15-692.18

Finding the Fourth Proportional to 1,189.25, 1,641.15 and 692.18

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Solution

The fourth proportional to 1,189.25, 1,641.15 and 692.18 is: 955.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189.25 : 1,641.15 = 692.18 : x
  2. Step 2: Convert to fraction form
    1,189.25/1,641.15 = 692.18/x
  3. Step 3: Cross multiply
    1,189.25x = 1,641.15 × 692.18
  4. Step 4: Simplify right side
    1,189.25x = 1,135,963.00
  5. Step 5: Solve for x
    x = 1,135,963.00/1,189.25
  6. Step 6: Final answer
    x = 955.20

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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.