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Finding the Fourth Proportional to 2,090.84, 3,137.10 and 858.86

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Solution

The fourth proportional to 2,090.84, 3,137.10 and 858.86 is: 1,288.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,090.84 : 3,137.10 = 858.86 : x
  2. Step 2: Convert to fraction form
    2,090.84/3,137.10 = 858.86/x
  3. Step 3: Cross multiply
    2,090.84x = 3,137.10 × 858.86
  4. Step 4: Simplify right side
    2,090.84x = 2,694,329.71
  5. Step 5: Solve for x
    x = 2,694,329.71/2,090.84
  6. Step 6: Final answer
    x = 1,288.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.