Home / 1,022.76-1,411.40-629.88

Finding the Fourth Proportional to 1,022.76, 1,411.40 and 629.88

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Solution

The fourth proportional to 1,022.76, 1,411.40 and 629.88 is: 869.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,022.76 : 1,411.40 = 629.88 : x
  2. Step 2: Convert to fraction form
    1,022.76/1,411.40 = 629.88/x
  3. Step 3: Cross multiply
    1,022.76x = 1,411.40 × 629.88
  4. Step 4: Simplify right side
    1,022.76x = 889,012.63
  5. Step 5: Solve for x
    x = 889,012.63/1,022.76
  6. Step 6: Final answer
    x = 869.23

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1.5x scale

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.