Home / 1,292.19-1,783.29-1,245.72

Finding the Fourth Proportional to 1,292.19, 1,783.29 and 1,245.72

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Solution

The fourth proportional to 1,292.19, 1,783.29 and 1,245.72 is: 1,719.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.19 : 1,783.29 = 1,245.72 : x
  2. Step 2: Convert to fraction form
    1,292.19/1,783.29 = 1,245.72/x
  3. Step 3: Cross multiply
    1,292.19x = 1,783.29 × 1,245.72
  4. Step 4: Simplify right side
    1,292.19x = 2,221,480.02
  5. Step 5: Solve for x
    x = 2,221,480.02/1,292.19
  6. Step 6: Final answer
    x = 1,719.16

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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.