Home / 2,818.55-3,887.95-1,698.78

Finding the Fourth Proportional to 2,818.55, 3,887.95 and 1,698.78

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Solution

The fourth proportional to 2,818.55, 3,887.95 and 1,698.78 is: 2,343.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,818.55 : 3,887.95 = 1,698.78 : x
  2. Step 2: Convert to fraction form
    2,818.55/3,887.95 = 1,698.78/x
  3. Step 3: Cross multiply
    2,818.55x = 3,887.95 × 1,698.78
  4. Step 4: Simplify right side
    2,818.55x = 6,604,771.70
  5. Step 5: Solve for x
    x = 6,604,771.70/2,818.55
  6. Step 6: Final answer
    x = 2,343.32

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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.