Home / 1,421.10-2,129.68-1,074.15

Finding the Fourth Proportional to 1,421.10, 2,129.68 and 1,074.15

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Solution

The fourth proportional to 1,421.10, 2,129.68 and 1,074.15 is: 1,609.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.10 : 2,129.68 = 1,074.15 : x
  2. Step 2: Convert to fraction form
    1,421.10/2,129.68 = 1,074.15/x
  3. Step 3: Cross multiply
    1,421.10x = 2,129.68 × 1,074.15
  4. Step 4: Simplify right side
    1,421.10x = 2,287,595.77
  5. Step 5: Solve for x
    x = 2,287,595.77/1,421.10
  6. Step 6: Final answer
    x = 1,609.74

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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.