Home / 1,140.18-1,571.60-891.06

Finding the Fourth Proportional to 1,140.18, 1,571.60 and 891.06

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Solution

The fourth proportional to 1,140.18, 1,571.60 and 891.06 is: 1,228.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,140.18 : 1,571.60 = 891.06 : x
  2. Step 2: Convert to fraction form
    1,140.18/1,571.60 = 891.06/x
  3. Step 3: Cross multiply
    1,140.18x = 1,571.60 × 891.06
  4. Step 4: Simplify right side
    1,140.18x = 1,400,385.44
  5. Step 5: Solve for x
    x = 1,400,385.44/1,140.18
  6. Step 6: Final answer
    x = 1,228.21

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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.