Home / 1,214.31-1,821.47-348.63

Finding the Fourth Proportional to 1,214.31, 1,821.47 and 348.63

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Solution

The fourth proportional to 1,214.31, 1,821.47 and 348.63 is: 522.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.31 : 1,821.47 = 348.63 : x
  2. Step 2: Convert to fraction form
    1,214.31/1,821.47 = 348.63/x
  3. Step 3: Cross multiply
    1,214.31x = 1,821.47 × 348.63
  4. Step 4: Simplify right side
    1,214.31x = 635,019.09
  5. Step 5: Solve for x
    x = 635,019.09/1,214.31
  6. Step 6: Final answer
    x = 522.95

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Double scale
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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.