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Finding the Fourth Proportional to 1,956.98, 2,699.60 and 1,210.70

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Solution

The fourth proportional to 1,956.98, 2,699.60 and 1,210.70 is: 1,670.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,956.98 : 2,699.60 = 1,210.70 : x
  2. Step 2: Convert to fraction form
    1,956.98/2,699.60 = 1,210.70/x
  3. Step 3: Cross multiply
    1,956.98x = 2,699.60 × 1,210.70
  4. Step 4: Simplify right side
    1,956.98x = 3,268,405.72
  5. Step 5: Solve for x
    x = 3,268,405.72/1,956.98
  6. Step 6: Final answer
    x = 1,670.13

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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.