Home / 1,805.24-2,486.94-1,386.20

Finding the Fourth Proportional to 1,805.24, 2,486.94 and 1,386.20

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Solution

The fourth proportional to 1,805.24, 2,486.94 and 1,386.20 is: 1,909.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,805.24 : 2,486.94 = 1,386.20 : x
  2. Step 2: Convert to fraction form
    1,805.24/2,486.94 = 1,386.20/x
  3. Step 3: Cross multiply
    1,805.24x = 2,486.94 × 1,386.20
  4. Step 4: Simplify right side
    1,805.24x = 3,447,383.79
  5. Step 5: Solve for x
    x = 3,447,383.79/1,805.24
  6. Step 6: Final answer
    x = 1,909.66

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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.