Home / 3,120.09-4,678.77-928.95

Finding the Fourth Proportional to 3,120.09, 4,678.77 and 928.95

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Solution

The fourth proportional to 3,120.09, 4,678.77 and 928.95 is: 1,393.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.09 : 4,678.77 = 928.95 : x
  2. Step 2: Convert to fraction form
    3,120.09/4,678.77 = 928.95/x
  3. Step 3: Cross multiply
    3,120.09x = 4,678.77 × 928.95
  4. Step 4: Simplify right side
    3,120.09x = 4,346,343.39
  5. Step 5: Solve for x
    x = 4,346,343.39/3,120.09
  6. Step 6: Final answer
    x = 1,393.02

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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.