Home / 3,421.20-5,127.15-1,445.19

Finding the Fourth Proportional to 3,421.20, 5,127.15 and 1,445.19

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Solution

The fourth proportional to 3,421.20, 5,127.15 and 1,445.19 is: 2,165.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.20 : 5,127.15 = 1,445.19 : x
  2. Step 2: Convert to fraction form
    3,421.20/5,127.15 = 1,445.19/x
  3. Step 3: Cross multiply
    3,421.20x = 5,127.15 × 1,445.19
  4. Step 4: Simplify right side
    3,421.20x = 7,409,712.81
  5. Step 5: Solve for x
    x = 7,409,712.81/3,421.20
  6. Step 6: Final answer
    x = 2,165.82

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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.