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Finding the Fourth Proportional to 1,964.90, 2,711.56 and 1,068.64

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Solution

The fourth proportional to 1,964.90, 2,711.56 and 1,068.64 is: 1,474.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,964.90 : 2,711.56 = 1,068.64 : x
  2. Step 2: Convert to fraction form
    1,964.90/2,711.56 = 1,068.64/x
  3. Step 3: Cross multiply
    1,964.90x = 2,711.56 × 1,068.64
  4. Step 4: Simplify right side
    1,964.90x = 2,897,681.48
  5. Step 5: Solve for x
    x = 2,897,681.48/1,964.90
  6. Step 6: Final answer
    x = 1,474.72

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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.