Home / 1,213.78-1,819.58-554.98

Finding the Fourth Proportional to 1,213.78, 1,819.58 and 554.98

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Solution

The fourth proportional to 1,213.78, 1,819.58 and 554.98 is: 831.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213.78 : 1,819.58 = 554.98 : x
  2. Step 2: Convert to fraction form
    1,213.78/1,819.58 = 554.98/x
  3. Step 3: Cross multiply
    1,213.78x = 1,819.58 × 554.98
  4. Step 4: Simplify right side
    1,213.78x = 1,009,830.51
  5. Step 5: Solve for x
    x = 1,009,830.51/1,213.78
  6. Step 6: Final answer
    x = 831.97

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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.