Home / 1,157.49-1,721.86-1,145.75

Finding the Fourth Proportional to 1,157.49, 1,721.86 and 1,145.75

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Solution

The fourth proportional to 1,157.49, 1,721.86 and 1,145.75 is: 1,704.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,157.49 : 1,721.86 = 1,145.75 : x
  2. Step 2: Convert to fraction form
    1,157.49/1,721.86 = 1,145.75/x
  3. Step 3: Cross multiply
    1,157.49x = 1,721.86 × 1,145.75
  4. Step 4: Simplify right side
    1,157.49x = 1,972,809.62
  5. Step 5: Solve for x
    x = 1,972,809.62/1,157.49
  6. Step 6: Final answer
    x = 1,704.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.