Home / 1,991.06-2,986.37-530.34

Finding the Fourth Proportional to 1,991.06, 2,986.37 and 530.34

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Solution

The fourth proportional to 1,991.06, 2,986.37 and 530.34 is: 795.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.06 : 2,986.37 = 530.34 : x
  2. Step 2: Convert to fraction form
    1,991.06/2,986.37 = 530.34/x
  3. Step 3: Cross multiply
    1,991.06x = 2,986.37 × 530.34
  4. Step 4: Simplify right side
    1,991.06x = 1,583,791.47
  5. Step 5: Solve for x
    x = 1,583,791.47/1,991.06
  6. Step 6: Final answer
    x = 795.45

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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.