Home / 1,536.40-2,120.35-906.83

Finding the Fourth Proportional to 1,536.40, 2,120.35 and 906.83

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Solution

The fourth proportional to 1,536.40, 2,120.35 and 906.83 is: 1,251.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,536.40 : 2,120.35 = 906.83 : x
  2. Step 2: Convert to fraction form
    1,536.40/2,120.35 = 906.83/x
  3. Step 3: Cross multiply
    1,536.40x = 2,120.35 × 906.83
  4. Step 4: Simplify right side
    1,536.40x = 1,922,796.99
  5. Step 5: Solve for x
    x = 1,922,796.99/1,536.40
  6. Step 6: Final answer
    x = 1,251.50

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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.