Home / 1,214.10-1,821.15-348.39

Finding the Fourth Proportional to 1,214.10, 1,821.15 and 348.39

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Solution

The fourth proportional to 1,214.10, 1,821.15 and 348.39 is: 522.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.10 : 1,821.15 = 348.39 : x
  2. Step 2: Convert to fraction form
    1,214.10/1,821.15 = 348.39/x
  3. Step 3: Cross multiply
    1,214.10x = 1,821.15 × 348.39
  4. Step 4: Simplify right side
    1,214.10x = 634,470.45
  5. Step 5: Solve for x
    x = 634,470.45/1,214.10
  6. Step 6: Final answer
    x = 522.59

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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.