Home / 1,921.30-2,880.73-1,301.65

Finding the Fourth Proportional to 1,921.30, 2,880.73 and 1,301.65

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Solution

The fourth proportional to 1,921.30, 2,880.73 and 1,301.65 is: 1,951.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.30 : 2,880.73 = 1,301.65 : x
  2. Step 2: Convert to fraction form
    1,921.30/2,880.73 = 1,301.65/x
  3. Step 3: Cross multiply
    1,921.30x = 2,880.73 × 1,301.65
  4. Step 4: Simplify right side
    1,921.30x = 3,749,702.20
  5. Step 5: Solve for x
    x = 3,749,702.20/1,921.30
  6. Step 6: Final answer
    x = 1,951.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.