Home / 1,591.21-2,195.43-918.97

Finding the Fourth Proportional to 1,591.21, 2,195.43 and 918.97

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Solution

The fourth proportional to 1,591.21, 2,195.43 and 918.97 is: 1,267.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,591.21 : 2,195.43 = 918.97 : x
  2. Step 2: Convert to fraction form
    1,591.21/2,195.43 = 918.97/x
  3. Step 3: Cross multiply
    1,591.21x = 2,195.43 × 918.97
  4. Step 4: Simplify right side
    1,591.21x = 2,017,534.31
  5. Step 5: Solve for x
    x = 2,017,534.31/1,591.21
  6. Step 6: Final answer
    x = 1,267.92

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1.5x scale

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.