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Finding the Fourth Proportional to 2,779.40, 4,170.90 and 1,609.40

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Solution

The fourth proportional to 2,779.40, 4,170.90 and 1,609.40 is: 2,415.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,779.40 : 4,170.90 = 1,609.40 : x
  2. Step 2: Convert to fraction form
    2,779.40/4,170.90 = 1,609.40/x
  3. Step 3: Cross multiply
    2,779.40x = 4,170.90 × 1,609.40
  4. Step 4: Simplify right side
    2,779.40x = 6,712,646.46
  5. Step 5: Solve for x
    x = 6,712,646.46/2,779.40
  6. Step 6: Final answer
    x = 2,415.14

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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.