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Finding the Fourth Proportional to 1,957.84, 2,700.20 and 1,211.09

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Solution

The fourth proportional to 1,957.84, 2,700.20 and 1,211.09 is: 1,670.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,957.84 : 2,700.20 = 1,211.09 : x
  2. Step 2: Convert to fraction form
    1,957.84/2,700.20 = 1,211.09/x
  3. Step 3: Cross multiply
    1,957.84x = 2,700.20 × 1,211.09
  4. Step 4: Simplify right side
    1,957.84x = 3,270,174.74
  5. Step 5: Solve for x
    x = 3,270,174.74/1,957.84
  6. Step 6: Final answer
    x = 1,670.30

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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.