Home / 1,388.01-2,090.23-1,207.58

Finding the Fourth Proportional to 1,388.01, 2,090.23 and 1,207.58

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Solution

The fourth proportional to 1,388.01, 2,090.23 and 1,207.58 is: 1,818.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388.01 : 2,090.23 = 1,207.58 : x
  2. Step 2: Convert to fraction form
    1,388.01/2,090.23 = 1,207.58/x
  3. Step 3: Cross multiply
    1,388.01x = 2,090.23 × 1,207.58
  4. Step 4: Simplify right side
    1,388.01x = 2,524,119.94
  5. Step 5: Solve for x
    x = 2,524,119.94/1,388.01
  6. Step 6: Final answer
    x = 1,818.52

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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.