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Finding the Fourth Proportional to 2,454.35, 3,680.64 and 810.65

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Solution

The fourth proportional to 2,454.35, 3,680.64 and 810.65 is: 1,215.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,454.35 : 3,680.64 = 810.65 : x
  2. Step 2: Convert to fraction form
    2,454.35/3,680.64 = 810.65/x
  3. Step 3: Cross multiply
    2,454.35x = 3,680.64 × 810.65
  4. Step 4: Simplify right side
    2,454.35x = 2,983,720.02
  5. Step 5: Solve for x
    x = 2,983,720.02/2,454.35
  6. Step 6: Final answer
    x = 1,215.69

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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.