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Finding the Fourth Proportional to 5,772.40, 7,965.88 and 3,119.81

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Solution

The fourth proportional to 5,772.40, 7,965.88 and 3,119.81 is: 4,305.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,772.40 : 7,965.88 = 3,119.81 : x
  2. Step 2: Convert to fraction form
    5,772.40/7,965.88 = 3,119.81/x
  3. Step 3: Cross multiply
    5,772.40x = 7,965.88 × 3,119.81
  4. Step 4: Simplify right side
    5,772.40x = 24,851,984.45
  5. Step 5: Solve for x
    x = 24,851,984.45/5,772.40
  6. Step 6: Final answer
    x = 4,305.31

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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.