Home / 1,271.28-1,897.16-1,263.98

Finding the Fourth Proportional to 1,271.28, 1,897.16 and 1,263.98

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Solution

The fourth proportional to 1,271.28, 1,897.16 and 1,263.98 is: 1,886.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,271.28 : 1,897.16 = 1,263.98 : x
  2. Step 2: Convert to fraction form
    1,271.28/1,897.16 = 1,263.98/x
  3. Step 3: Cross multiply
    1,271.28x = 1,897.16 × 1,263.98
  4. Step 4: Simplify right side
    1,271.28x = 2,397,972.30
  5. Step 5: Solve for x
    x = 2,397,972.30/1,271.28
  6. Step 6: Final answer
    x = 1,886.27

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.