Home / 2,108.18-2,908.07-1,223.87

Finding the Fourth Proportional to 2,108.18, 2,908.07 and 1,223.87

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Solution

The fourth proportional to 2,108.18, 2,908.07 and 1,223.87 is: 1,688.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,108.18 : 2,908.07 = 1,223.87 : x
  2. Step 2: Convert to fraction form
    2,108.18/2,908.07 = 1,223.87/x
  3. Step 3: Cross multiply
    2,108.18x = 2,908.07 × 1,223.87
  4. Step 4: Simplify right side
    2,108.18x = 3,559,088.15
  5. Step 5: Solve for x
    x = 3,559,088.15/2,108.18
  6. Step 6: Final answer
    x = 1,688.23

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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.