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Finding the Fourth Proportional to 2,828.80, 4,239.34 and 2,134.88

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Solution

The fourth proportional to 2,828.80, 4,239.34 and 2,134.88 is: 3,199.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,828.80 : 4,239.34 = 2,134.88 : x
  2. Step 2: Convert to fraction form
    2,828.80/4,239.34 = 2,134.88/x
  3. Step 3: Cross multiply
    2,828.80x = 4,239.34 × 2,134.88
  4. Step 4: Simplify right side
    2,828.80x = 9,050,482.18
  5. Step 5: Solve for x
    x = 9,050,482.18/2,828.80
  6. Step 6: Final answer
    x = 3,199.41

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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.