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Finding the Fourth Proportional to 1,271, 1,904.88 and 723.44

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Solution

The fourth proportional to 1,271, 1,904.88 and 723.44 is: 1,084.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,271 : 1,904.88 = 723.44 : x
  2. Step 2: Convert to fraction form
    1,271/1,904.88 = 723.44/x
  3. Step 3: Cross multiply
    1,271x = 1,904.88 × 723.44
  4. Step 4: Simplify right side
    1,271x = 1,378,066.39
  5. Step 5: Solve for x
    x = 1,378,066.39/1,271
  6. Step 6: Final answer
    x = 1,084.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.