Home / 1,905.90-2,630.07-1,242.78

Finding the Fourth Proportional to 1,905.90, 2,630.07 and 1,242.78

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Solution

The fourth proportional to 1,905.90, 2,630.07 and 1,242.78 is: 1,714.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,905.90 : 2,630.07 = 1,242.78 : x
  2. Step 2: Convert to fraction form
    1,905.90/2,630.07 = 1,242.78/x
  3. Step 3: Cross multiply
    1,905.90x = 2,630.07 × 1,242.78
  4. Step 4: Simplify right side
    1,905.90x = 3,268,598.39
  5. Step 5: Solve for x
    x = 3,268,598.39/1,905.90
  6. Step 6: Final answer
    x = 1,714.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.