Home / 1,809.45-2,496.08-1,220.18

Finding the Fourth Proportional to 1,809.45, 2,496.08 and 1,220.18

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Solution

The fourth proportional to 1,809.45, 2,496.08 and 1,220.18 is: 1,683.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,809.45 : 2,496.08 = 1,220.18 : x
  2. Step 2: Convert to fraction form
    1,809.45/2,496.08 = 1,220.18/x
  3. Step 3: Cross multiply
    1,809.45x = 2,496.08 × 1,220.18
  4. Step 4: Simplify right side
    1,809.45x = 3,045,666.89
  5. Step 5: Solve for x
    x = 3,045,666.89/1,809.45
  6. Step 6: Final answer
    x = 1,683.20

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Half scale
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Double scale
Find fourth proportional to 1,810.45, 2,497.46 and 1,221.18
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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.