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Finding the Fourth Proportional to 1,219.81, 1,828.41 and 526.81

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Solution

The fourth proportional to 1,219.81, 1,828.41 and 526.81 is: 789.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,219.81 : 1,828.41 = 526.81 : x
  2. Step 2: Convert to fraction form
    1,219.81/1,828.41 = 526.81/x
  3. Step 3: Cross multiply
    1,219.81x = 1,828.41 × 526.81
  4. Step 4: Simplify right side
    1,219.81x = 963,223.69
  5. Step 5: Solve for x
    x = 963,223.69/1,219.81
  6. Step 6: Final answer
    x = 789.65

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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.