Home / 2,830.21-4,239.78-1,853.35

Finding the Fourth Proportional to 2,830.21, 4,239.78 and 1,853.35

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Solution

The fourth proportional to 2,830.21, 4,239.78 and 1,853.35 is: 2,776.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,830.21 : 4,239.78 = 1,853.35 : x
  2. Step 2: Convert to fraction form
    2,830.21/4,239.78 = 1,853.35/x
  3. Step 3: Cross multiply
    2,830.21x = 4,239.78 × 1,853.35
  4. Step 4: Simplify right side
    2,830.21x = 7,857,792.61
  5. Step 5: Solve for x
    x = 7,857,792.61/2,830.21
  6. Step 6: Final answer
    x = 2,776.40

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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.