Home / 1,551.24-2,140.83-921.96

Finding the Fourth Proportional to 1,551.24, 2,140.83 and 921.96

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Solution

The fourth proportional to 1,551.24, 2,140.83 and 921.96 is: 1,272.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,551.24 : 2,140.83 = 921.96 : x
  2. Step 2: Convert to fraction form
    1,551.24/2,140.83 = 921.96/x
  3. Step 3: Cross multiply
    1,551.24x = 2,140.83 × 921.96
  4. Step 4: Simplify right side
    1,551.24x = 1,973,759.63
  5. Step 5: Solve for x
    x = 1,973,759.63/1,551.24
  6. Step 6: Final answer
    x = 1,272.38

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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.