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Finding the Fourth Proportional to 1,210.88, 1,815.85 and 480.94

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Solution

The fourth proportional to 1,210.88, 1,815.85 and 480.94 is: 721.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.88 : 1,815.85 = 480.94 : x
  2. Step 2: Convert to fraction form
    1,210.88/1,815.85 = 480.94/x
  3. Step 3: Cross multiply
    1,210.88x = 1,815.85 × 480.94
  4. Step 4: Simplify right side
    1,210.88x = 873,310.96
  5. Step 5: Solve for x
    x = 873,310.96/1,210.88
  6. Step 6: Final answer
    x = 721.22

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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.