Home / 1,214.51-1,821.58-392.67

Finding the Fourth Proportional to 1,214.51, 1,821.58 and 392.67

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Solution

The fourth proportional to 1,214.51, 1,821.58 and 392.67 is: 588.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.51 : 1,821.58 = 392.67 : x
  2. Step 2: Convert to fraction form
    1,214.51/1,821.58 = 392.67/x
  3. Step 3: Cross multiply
    1,214.51x = 1,821.58 × 392.67
  4. Step 4: Simplify right side
    1,214.51x = 715,278.84
  5. Step 5: Solve for x
    x = 715,278.84/1,214.51
  6. Step 6: Final answer
    x = 588.95

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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.