Home / 1,388.52-2,090.98-1,208.08

Finding the Fourth Proportional to 1,388.52, 2,090.98 and 1,208.08

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Solution

The fourth proportional to 1,388.52, 2,090.98 and 1,208.08 is: 1,819.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388.52 : 2,090.98 = 1,208.08 : x
  2. Step 2: Convert to fraction form
    1,388.52/2,090.98 = 1,208.08/x
  3. Step 3: Cross multiply
    1,388.52x = 2,090.98 × 1,208.08
  4. Step 4: Simplify right side
    1,388.52x = 2,526,071.12
  5. Step 5: Solve for x
    x = 2,526,071.12/1,388.52
  6. Step 6: Final answer
    x = 1,819.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.