Home / 2,378.15-3,281.85-1,330.21

Finding the Fourth Proportional to 2,378.15, 3,281.85 and 1,330.21

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Solution

The fourth proportional to 2,378.15, 3,281.85 and 1,330.21 is: 1,835.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,378.15 : 3,281.85 = 1,330.21 : x
  2. Step 2: Convert to fraction form
    2,378.15/3,281.85 = 1,330.21/x
  3. Step 3: Cross multiply
    2,378.15x = 3,281.85 × 1,330.21
  4. Step 4: Simplify right side
    2,378.15x = 4,365,549.69
  5. Step 5: Solve for x
    x = 4,365,549.69/2,378.15
  6. Step 6: Final answer
    x = 1,835.69

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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.