Home / 3,120.56-4,681.78-929.36

Finding the Fourth Proportional to 3,120.56, 4,681.78 and 929.36

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Solution

The fourth proportional to 3,120.56, 4,681.78 and 929.36 is: 1,394.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.56 : 4,681.78 = 929.36 : x
  2. Step 2: Convert to fraction form
    3,120.56/4,681.78 = 929.36/x
  3. Step 3: Cross multiply
    3,120.56x = 4,681.78 × 929.36
  4. Step 4: Simplify right side
    3,120.56x = 4,351,059.06
  5. Step 5: Solve for x
    x = 4,351,059.06/3,120.56
  6. Step 6: Final answer
    x = 1,394.32

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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.