Home / 1,614.18-2,419.15-639.75

Finding the Fourth Proportional to 1,614.18, 2,419.15 and 639.75

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Solution

The fourth proportional to 1,614.18, 2,419.15 and 639.75 is: 958.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,614.18 : 2,419.15 = 639.75 : x
  2. Step 2: Convert to fraction form
    1,614.18/2,419.15 = 639.75/x
  3. Step 3: Cross multiply
    1,614.18x = 2,419.15 × 639.75
  4. Step 4: Simplify right side
    1,614.18x = 1,547,651.21
  5. Step 5: Solve for x
    x = 1,547,651.21/1,614.18
  6. Step 6: Final answer
    x = 958.78

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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.