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Finding the Fourth Proportional to 1,210.66, 1,811.87 and 1,015.88

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Solution

The fourth proportional to 1,210.66, 1,811.87 and 1,015.88 is: 1,520.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.66 : 1,811.87 = 1,015.88 : x
  2. Step 2: Convert to fraction form
    1,210.66/1,811.87 = 1,015.88/x
  3. Step 3: Cross multiply
    1,210.66x = 1,811.87 × 1,015.88
  4. Step 4: Simplify right side
    1,210.66x = 1,840,640.51
  5. Step 5: Solve for x
    x = 1,840,640.51/1,210.66
  6. Step 6: Final answer
    x = 1,520.36

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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.