Home / 1,419.12-2,129.29-958.64

Finding the Fourth Proportional to 1,419.12, 2,129.29 and 958.64

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Solution

The fourth proportional to 1,419.12, 2,129.29 and 958.64 is: 1,438.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,419.12 : 2,129.29 = 958.64 : x
  2. Step 2: Convert to fraction form
    1,419.12/2,129.29 = 958.64/x
  3. Step 3: Cross multiply
    1,419.12x = 2,129.29 × 958.64
  4. Step 4: Simplify right side
    1,419.12x = 2,041,209.52
  5. Step 5: Solve for x
    x = 2,041,209.52/1,419.12
  6. Step 6: Final answer
    x = 1,438.36

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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.