Home / 2,830.68-4,245.46-981.79

Finding the Fourth Proportional to 2,830.68, 4,245.46 and 981.79

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Solution

The fourth proportional to 2,830.68, 4,245.46 and 981.79 is: 1,472.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,830.68 : 4,245.46 = 981.79 : x
  2. Step 2: Convert to fraction form
    2,830.68/4,245.46 = 981.79/x
  3. Step 3: Cross multiply
    2,830.68x = 4,245.46 × 981.79
  4. Step 4: Simplify right side
    2,830.68x = 4,168,137.11
  5. Step 5: Solve for x
    x = 4,168,137.11/2,830.68
  6. Step 6: Final answer
    x = 1,472.49

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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.