Home / 1,271.40-1,904.62-1,133.80

Finding the Fourth Proportional to 1,271.40, 1,904.62 and 1,133.80

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Solution

The fourth proportional to 1,271.40, 1,904.62 and 1,133.80 is: 1,698.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,271.40 : 1,904.62 = 1,133.80 : x
  2. Step 2: Convert to fraction form
    1,271.40/1,904.62 = 1,133.80/x
  3. Step 3: Cross multiply
    1,271.40x = 1,904.62 × 1,133.80
  4. Step 4: Simplify right side
    1,271.40x = 2,159,458.16
  5. Step 5: Solve for x
    x = 2,159,458.16/1,271.40
  6. Step 6: Final answer
    x = 1,698.49

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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.