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Finding the Fourth Proportional to 1,210.84, 1,811.67 and 717.51

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Solution

The fourth proportional to 1,210.84, 1,811.67 and 717.51 is: 1,073.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.84 : 1,811.67 = 717.51 : x
  2. Step 2: Convert to fraction form
    1,210.84/1,811.67 = 717.51/x
  3. Step 3: Cross multiply
    1,210.84x = 1,811.67 × 717.51
  4. Step 4: Simplify right side
    1,210.84x = 1,299,885.25
  5. Step 5: Solve for x
    x = 1,299,885.25/1,210.84
  6. Step 6: Final answer
    x = 1,073.54

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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.