Home / 1,116.40-1,673.28-629.92

Finding the Fourth Proportional to 1,116.40, 1,673.28 and 629.92

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Solution

The fourth proportional to 1,116.40, 1,673.28 and 629.92 is: 944.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,116.40 : 1,673.28 = 629.92 : x
  2. Step 2: Convert to fraction form
    1,116.40/1,673.28 = 629.92/x
  3. Step 3: Cross multiply
    1,116.40x = 1,673.28 × 629.92
  4. Step 4: Simplify right side
    1,116.40x = 1,054,032.54
  5. Step 5: Solve for x
    x = 1,054,032.54/1,116.40
  6. Step 6: Final answer
    x = 944.14

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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.