Home / 3,120.81-4,681.22-929.56

Finding the Fourth Proportional to 3,120.81, 4,681.22 and 929.56

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Solution

The fourth proportional to 3,120.81, 4,681.22 and 929.56 is: 1,394.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.81 : 4,681.22 = 929.56 : x
  2. Step 2: Convert to fraction form
    3,120.81/4,681.22 = 929.56/x
  3. Step 3: Cross multiply
    3,120.81x = 4,681.22 × 929.56
  4. Step 4: Simplify right side
    3,120.81x = 4,351,474.86
  5. Step 5: Solve for x
    x = 4,351,474.86/3,120.81
  6. Step 6: Final answer
    x = 1,394.34

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.