Home / 1,591.16-2,195.81-918.91

Finding the Fourth Proportional to 1,591.16, 2,195.81 and 918.91

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Solution

The fourth proportional to 1,591.16, 2,195.81 and 918.91 is: 1,268.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,591.16 : 2,195.81 = 918.91 : x
  2. Step 2: Convert to fraction form
    1,591.16/2,195.81 = 918.91/x
  3. Step 3: Cross multiply
    1,591.16x = 2,195.81 × 918.91
  4. Step 4: Simplify right side
    1,591.16x = 2,017,751.77
  5. Step 5: Solve for x
    x = 2,017,751.77/1,591.16
  6. Step 6: Final answer
    x = 1,268.11

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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.