Home / 2,285.51-3,153.66-1,290.65

Finding the Fourth Proportional to 2,285.51, 3,153.66 and 1,290.65

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Solution

The fourth proportional to 2,285.51, 3,153.66 and 1,290.65 is: 1,780.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,285.51 : 3,153.66 = 1,290.65 : x
  2. Step 2: Convert to fraction form
    2,285.51/3,153.66 = 1,290.65/x
  3. Step 3: Cross multiply
    2,285.51x = 3,153.66 × 1,290.65
  4. Step 4: Simplify right side
    2,285.51x = 4,070,271.28
  5. Step 5: Solve for x
    x = 4,070,271.28/2,285.51
  6. Step 6: Final answer
    x = 1,780.90

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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.