Home / 1,905.64-2,630.20-1,242.65

Finding the Fourth Proportional to 1,905.64, 2,630.20 and 1,242.65

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Solution

The fourth proportional to 1,905.64, 2,630.20 and 1,242.65 is: 1,715.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,905.64 : 2,630.20 = 1,242.65 : x
  2. Step 2: Convert to fraction form
    1,905.64/2,630.20 = 1,242.65/x
  3. Step 3: Cross multiply
    1,905.64x = 2,630.20 × 1,242.65
  4. Step 4: Simplify right side
    1,905.64x = 3,268,418.03
  5. Step 5: Solve for x
    x = 3,268,418.03/1,905.64
  6. Step 6: Final answer
    x = 1,715.13

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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.