Home / 1,410.17-2,115.25-640.13

Finding the Fourth Proportional to 1,410.17, 2,115.25 and 640.13

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Solution

The fourth proportional to 1,410.17, 2,115.25 and 640.13 is: 960.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,410.17 : 2,115.25 = 640.13 : x
  2. Step 2: Convert to fraction form
    1,410.17/2,115.25 = 640.13/x
  3. Step 3: Cross multiply
    1,410.17x = 2,115.25 × 640.13
  4. Step 4: Simplify right side
    1,410.17x = 1,354,022.81
  5. Step 5: Solve for x
    x = 1,354,022.81/1,410.17
  6. Step 6: Final answer
    x = 960.19

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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.