Home / 1,153.19-1,591.38-629.21

Finding the Fourth Proportional to 1,153.19, 1,591.38 and 629.21

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Solution

The fourth proportional to 1,153.19, 1,591.38 and 629.21 is: 868.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,153.19 : 1,591.38 = 629.21 : x
  2. Step 2: Convert to fraction form
    1,153.19/1,591.38 = 629.21/x
  3. Step 3: Cross multiply
    1,153.19x = 1,591.38 × 629.21
  4. Step 4: Simplify right side
    1,153.19x = 1,001,312.21
  5. Step 5: Solve for x
    x = 1,001,312.21/1,153.19
  6. Step 6: Final answer
    x = 868.30

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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.