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Finding the Fourth Proportional to 1,117, 1,673.88 and 629.38

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Solution

The fourth proportional to 1,117, 1,673.88 and 629.38 is: 943.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,117 : 1,673.88 = 629.38 : x
  2. Step 2: Convert to fraction form
    1,117/1,673.88 = 629.38/x
  3. Step 3: Cross multiply
    1,117x = 1,673.88 × 629.38
  4. Step 4: Simplify right side
    1,117x = 1,053,506.59
  5. Step 5: Solve for x
    x = 1,053,506.59/1,117
  6. Step 6: Final answer
    x = 943.16

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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.