Home / 3,123.21-4,310.42-1,779.15

Finding the Fourth Proportional to 3,123.21, 4,310.42 and 1,779.15

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Solution

The fourth proportional to 3,123.21, 4,310.42 and 1,779.15 is: 2,455.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.21 : 4,310.42 = 1,779.15 : x
  2. Step 2: Convert to fraction form
    3,123.21/4,310.42 = 1,779.15/x
  3. Step 3: Cross multiply
    3,123.21x = 4,310.42 × 1,779.15
  4. Step 4: Simplify right side
    3,123.21x = 7,668,883.74
  5. Step 5: Solve for x
    x = 7,668,883.74/3,123.21
  6. Step 6: Final answer
    x = 2,455.45

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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.