Home / 1,113.28-1,671.36-943.36

Finding the Fourth Proportional to 1,113.28, 1,671.36 and 943.36

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Solution

The fourth proportional to 1,113.28, 1,671.36 and 943.36 is: 1,416.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,113.28 : 1,671.36 = 943.36 : x
  2. Step 2: Convert to fraction form
    1,113.28/1,671.36 = 943.36/x
  3. Step 3: Cross multiply
    1,113.28x = 1,671.36 × 943.36
  4. Step 4: Simplify right side
    1,113.28x = 1,576,694.17
  5. Step 5: Solve for x
    x = 1,576,694.17/1,113.28
  6. Step 6: Final answer
    x = 1,416.26

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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.