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Finding the Fourth Proportional to 1,210.56, 1,811.88 and 885.84

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Solution

The fourth proportional to 1,210.56, 1,811.88 and 885.84 is: 1,325.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.56 : 1,811.88 = 885.84 : x
  2. Step 2: Convert to fraction form
    1,210.56/1,811.88 = 885.84/x
  3. Step 3: Cross multiply
    1,210.56x = 1,811.88 × 885.84
  4. Step 4: Simplify right side
    1,210.56x = 1,605,035.78
  5. Step 5: Solve for x
    x = 1,605,035.78/1,210.56
  6. Step 6: Final answer
    x = 1,325.86

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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.