Home / 1,211.45-1,674.86-1,159.80

Finding the Fourth Proportional to 1,211.45, 1,674.86 and 1,159.80

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Solution

The fourth proportional to 1,211.45, 1,674.86 and 1,159.80 is: 1,603.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.45 : 1,674.86 = 1,159.80 : x
  2. Step 2: Convert to fraction form
    1,211.45/1,674.86 = 1,159.80/x
  3. Step 3: Cross multiply
    1,211.45x = 1,674.86 × 1,159.80
  4. Step 4: Simplify right side
    1,211.45x = 1,942,496.83
  5. Step 5: Solve for x
    x = 1,942,496.83/1,211.45
  6. Step 6: Final answer
    x = 1,603.45

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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.