Home / 2,931.08-4,042.74-1,999.88

Finding the Fourth Proportional to 2,931.08, 4,042.74 and 1,999.88

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Solution

The fourth proportional to 2,931.08, 4,042.74 and 1,999.88 is: 2,758.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,931.08 : 4,042.74 = 1,999.88 : x
  2. Step 2: Convert to fraction form
    2,931.08/4,042.74 = 1,999.88/x
  3. Step 3: Cross multiply
    2,931.08x = 4,042.74 × 1,999.88
  4. Step 4: Simplify right side
    2,931.08x = 8,084,994.87
  5. Step 5: Solve for x
    x = 8,084,994.87/2,931.08
  6. Step 6: Final answer
    x = 2,758.37

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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.