Home / 1,208.02-1,812.30-622.78

Finding the Fourth Proportional to 1,208.02, 1,812.30 and 622.78

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Solution

The fourth proportional to 1,208.02, 1,812.30 and 622.78 is: 934.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208.02 : 1,812.30 = 622.78 : x
  2. Step 2: Convert to fraction form
    1,208.02/1,812.30 = 622.78/x
  3. Step 3: Cross multiply
    1,208.02x = 1,812.30 × 622.78
  4. Step 4: Simplify right side
    1,208.02x = 1,128,664.19
  5. Step 5: Solve for x
    x = 1,128,664.19/1,208.02
  6. Step 6: Final answer
    x = 934.31

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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.