Home / 1,980.32-2,733.36-1,234.40

Finding the Fourth Proportional to 1,980.32, 2,733.36 and 1,234.40

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Solution

The fourth proportional to 1,980.32, 2,733.36 and 1,234.40 is: 1,703.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,980.32 : 2,733.36 = 1,234.40 : x
  2. Step 2: Convert to fraction form
    1,980.32/2,733.36 = 1,234.40/x
  3. Step 3: Cross multiply
    1,980.32x = 2,733.36 × 1,234.40
  4. Step 4: Simplify right side
    1,980.32x = 3,374,059.58
  5. Step 5: Solve for x
    x = 3,374,059.58/1,980.32
  6. Step 6: Final answer
    x = 1,703.80

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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.