Home / 3,123.95-4,311.30-1,779.62

Finding the Fourth Proportional to 3,123.95, 4,311.30 and 1,779.62

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Solution

The fourth proportional to 3,123.95, 4,311.30 and 1,779.62 is: 2,456.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.95 : 4,311.30 = 1,779.62 : x
  2. Step 2: Convert to fraction form
    3,123.95/4,311.30 = 1,779.62/x
  3. Step 3: Cross multiply
    3,123.95x = 4,311.30 × 1,779.62
  4. Step 4: Simplify right side
    3,123.95x = 7,672,445.25
  5. Step 5: Solve for x
    x = 7,672,445.25/3,123.95
  6. Step 6: Final answer
    x = 2,456.01

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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.