Home / 1,002.12-1,382.02-629.14

Finding the Fourth Proportional to 1,002.12, 1,382.02 and 629.14

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Solution

The fourth proportional to 1,002.12, 1,382.02 and 629.14 is: 867.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,002.12 : 1,382.02 = 629.14 : x
  2. Step 2: Convert to fraction form
    1,002.12/1,382.02 = 629.14/x
  3. Step 3: Cross multiply
    1,002.12x = 1,382.02 × 629.14
  4. Step 4: Simplify right side
    1,002.12x = 869,484.06
  5. Step 5: Solve for x
    x = 869,484.06/1,002.12
  6. Step 6: Final answer
    x = 867.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.