Home / 3,612.16-5,421.60-1,422.40

Finding the Fourth Proportional to 3,612.16, 5,421.60 and 1,422.40

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Solution

The fourth proportional to 3,612.16, 5,421.60 and 1,422.40 is: 2,134.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,612.16 : 5,421.60 = 1,422.40 : x
  2. Step 2: Convert to fraction form
    3,612.16/5,421.60 = 1,422.40/x
  3. Step 3: Cross multiply
    3,612.16x = 5,421.60 × 1,422.40
  4. Step 4: Simplify right side
    3,612.16x = 7,711,683.84
  5. Step 5: Solve for x
    x = 7,711,683.84/3,612.16
  6. Step 6: Final answer
    x = 2,134.92

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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.