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Finding the Fourth Proportional to 2,179.99, 3,007.65 and 1,235.68

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Solution

The fourth proportional to 2,179.99, 3,007.65 and 1,235.68 is: 1,704.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,179.99 : 3,007.65 = 1,235.68 : x
  2. Step 2: Convert to fraction form
    2,179.99/3,007.65 = 1,235.68/x
  3. Step 3: Cross multiply
    2,179.99x = 3,007.65 × 1,235.68
  4. Step 4: Simplify right side
    2,179.99x = 3,716,492.95
  5. Step 5: Solve for x
    x = 3,716,492.95/2,179.99
  6. Step 6: Final answer
    x = 1,704.82

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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.