Home / 1,214.78-1,821.62-348.89

Finding the Fourth Proportional to 1,214.78, 1,821.62 and 348.89

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Solution

The fourth proportional to 1,214.78, 1,821.62 and 348.89 is: 523.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.78 : 1,821.62 = 348.89 : x
  2. Step 2: Convert to fraction form
    1,214.78/1,821.62 = 348.89/x
  3. Step 3: Cross multiply
    1,214.78x = 1,821.62 × 348.89
  4. Step 4: Simplify right side
    1,214.78x = 635,536.77
  5. Step 5: Solve for x
    x = 635,536.77/1,214.78
  6. Step 6: Final answer
    x = 523.17

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1.5x scale

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.