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Finding the Fourth Proportional to 1,271.57, 1,754.85 and 712.01

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Solution

The fourth proportional to 1,271.57, 1,754.85 and 712.01 is: 982.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,271.57 : 1,754.85 = 712.01 : x
  2. Step 2: Convert to fraction form
    1,271.57/1,754.85 = 712.01/x
  3. Step 3: Cross multiply
    1,271.57x = 1,754.85 × 712.01
  4. Step 4: Simplify right side
    1,271.57x = 1,249,458.41
  5. Step 5: Solve for x
    x = 1,249,458.41/1,271.57
  6. Step 6: Final answer
    x = 982.61

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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.