Home / 1,214.29-1,820.32-392.14

Finding the Fourth Proportional to 1,214.29, 1,820.32 and 392.14

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Solution

The fourth proportional to 1,214.29, 1,820.32 and 392.14 is: 587.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.29 : 1,820.32 = 392.14 : x
  2. Step 2: Convert to fraction form
    1,214.29/1,820.32 = 392.14/x
  3. Step 3: Cross multiply
    1,214.29x = 1,820.32 × 392.14
  4. Step 4: Simplify right side
    1,214.29x = 713,814.75
  5. Step 5: Solve for x
    x = 713,814.75/1,214.29
  6. Step 6: Final answer
    x = 587.85

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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.