Home / 2,128.80-2,941.76-1,603.92

Finding the Fourth Proportional to 2,128.80, 2,941.76 and 1,603.92

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Solution

The fourth proportional to 2,128.80, 2,941.76 and 1,603.92 is: 2,216.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.80 : 2,941.76 = 1,603.92 : x
  2. Step 2: Convert to fraction form
    2,128.80/2,941.76 = 1,603.92/x
  3. Step 3: Cross multiply
    2,128.80x = 2,941.76 × 1,603.92
  4. Step 4: Simplify right side
    2,128.80x = 4,718,347.70
  5. Step 5: Solve for x
    x = 4,718,347.70/2,128.80
  6. Step 6: Final answer
    x = 2,216.44

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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.