Home / 1,355.24-1,865.86-1,205.16

Finding the Fourth Proportional to 1,355.24, 1,865.86 and 1,205.16

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Solution

The fourth proportional to 1,355.24, 1,865.86 and 1,205.16 is: 1,659.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.24 : 1,865.86 = 1,205.16 : x
  2. Step 2: Convert to fraction form
    1,355.24/1,865.86 = 1,205.16/x
  3. Step 3: Cross multiply
    1,355.24x = 1,865.86 × 1,205.16
  4. Step 4: Simplify right side
    1,355.24x = 2,248,659.84
  5. Step 5: Solve for x
    x = 2,248,659.84/1,355.24
  6. Step 6: Final answer
    x = 1,659.23

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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.