Home / 1,304.28-1,799.46-780.12

Finding the Fourth Proportional to 1,304.28, 1,799.46 and 780.12

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Solution

The fourth proportional to 1,304.28, 1,799.46 and 780.12 is: 1,076.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,304.28 : 1,799.46 = 780.12 : x
  2. Step 2: Convert to fraction form
    1,304.28/1,799.46 = 780.12/x
  3. Step 3: Cross multiply
    1,304.28x = 1,799.46 × 780.12
  4. Step 4: Simplify right side
    1,304.28x = 1,403,794.74
  5. Step 5: Solve for x
    x = 1,403,794.74/1,304.28
  6. Step 6: Final answer
    x = 1,076.30

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1.5x scale

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.