Home / 1,536.10-2,119.85-906.79

Finding the Fourth Proportional to 1,536.10, 2,119.85 and 906.79

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Solution

The fourth proportional to 1,536.10, 2,119.85 and 906.79 is: 1,251.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,536.10 : 2,119.85 = 906.79 : x
  2. Step 2: Convert to fraction form
    1,536.10/2,119.85 = 906.79/x
  3. Step 3: Cross multiply
    1,536.10x = 2,119.85 × 906.79
  4. Step 4: Simplify right side
    1,536.10x = 1,922,258.02
  5. Step 5: Solve for x
    x = 1,922,258.02/1,536.10
  6. Step 6: Final answer
    x = 1,251.39

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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.