Home / 1,680.50-2,319.30-1,090.82

Finding the Fourth Proportional to 1,680.50, 2,319.30 and 1,090.82

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Solution

The fourth proportional to 1,680.50, 2,319.30 and 1,090.82 is: 1,505.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680.50 : 2,319.30 = 1,090.82 : x
  2. Step 2: Convert to fraction form
    1,680.50/2,319.30 = 1,090.82/x
  3. Step 3: Cross multiply
    1,680.50x = 2,319.30 × 1,090.82
  4. Step 4: Simplify right side
    1,680.50x = 2,529,944.62
  5. Step 5: Solve for x
    x = 2,529,944.62/1,680.50
  6. Step 6: Final answer
    x = 1,505.47

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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.