Home / 3,419.28-5,129.64-2,931.12

Finding the Fourth Proportional to 3,419.28, 5,129.64 and 2,931.12

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Solution

The fourth proportional to 3,419.28, 5,129.64 and 2,931.12 is: 4,397.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,419.28 : 5,129.64 = 2,931.12 : x
  2. Step 2: Convert to fraction form
    3,419.28/5,129.64 = 2,931.12/x
  3. Step 3: Cross multiply
    3,419.28x = 5,129.64 × 2,931.12
  4. Step 4: Simplify right side
    3,419.28x = 15,035,590.40
  5. Step 5: Solve for x
    x = 15,035,590.40/3,419.28
  6. Step 6: Final answer
    x = 4,397.30

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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.