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Finding the Fourth Proportional to 1,236.94, 1,854.02 and 621.17

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Solution

The fourth proportional to 1,236.94, 1,854.02 and 621.17 is: 931.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,236.94 : 1,854.02 = 621.17 : x
  2. Step 2: Convert to fraction form
    1,236.94/1,854.02 = 621.17/x
  3. Step 3: Cross multiply
    1,236.94x = 1,854.02 × 621.17
  4. Step 4: Simplify right side
    1,236.94x = 1,151,660.84
  5. Step 5: Solve for x
    x = 1,151,660.84/1,236.94
  6. Step 6: Final answer
    x = 931.06

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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.