Home / 1,986.40-2,975.73-1,061.64

Finding the Fourth Proportional to 1,986.40, 2,975.73 and 1,061.64

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Solution

The fourth proportional to 1,986.40, 2,975.73 and 1,061.64 is: 1,590.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.40 : 2,975.73 = 1,061.64 : x
  2. Step 2: Convert to fraction form
    1,986.40/2,975.73 = 1,061.64/x
  3. Step 3: Cross multiply
    1,986.40x = 2,975.73 × 1,061.64
  4. Step 4: Simplify right side
    1,986.40x = 3,159,154.00
  5. Step 5: Solve for x
    x = 3,159,154.00/1,986.40
  6. Step 6: Final answer
    x = 1,590.39

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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.