Home / 2,116.40-2,922.36-1,420.88

Finding the Fourth Proportional to 2,116.40, 2,922.36 and 1,420.88

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Solution

The fourth proportional to 2,116.40, 2,922.36 and 1,420.88 is: 1,961.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,116.40 : 2,922.36 = 1,420.88 : x
  2. Step 2: Convert to fraction form
    2,116.40/2,922.36 = 1,420.88/x
  3. Step 3: Cross multiply
    2,116.40x = 2,922.36 × 1,420.88
  4. Step 4: Simplify right side
    2,116.40x = 4,152,322.88
  5. Step 5: Solve for x
    x = 4,152,322.88/2,116.40
  6. Step 6: Final answer
    x = 1,961.97

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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.