Home / 2,108.15-2,908.75-1,223.45

Finding the Fourth Proportional to 2,108.15, 2,908.75 and 1,223.45

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Solution

The fourth proportional to 2,108.15, 2,908.75 and 1,223.45 is: 1,688.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,108.15 : 2,908.75 = 1,223.45 : x
  2. Step 2: Convert to fraction form
    2,108.15/2,908.75 = 1,223.45/x
  3. Step 3: Cross multiply
    2,108.15x = 2,908.75 × 1,223.45
  4. Step 4: Simplify right side
    2,108.15x = 3,558,710.19
  5. Step 5: Solve for x
    x = 3,558,710.19/2,108.15
  6. Step 6: Final answer
    x = 1,688.07

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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.