Home / 1,035.60-1,428.45-720.36

Finding the Fourth Proportional to 1,035.60, 1,428.45 and 720.36

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Solution

The fourth proportional to 1,035.60, 1,428.45 and 720.36 is: 993.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,035.60 : 1,428.45 = 720.36 : x
  2. Step 2: Convert to fraction form
    1,035.60/1,428.45 = 720.36/x
  3. Step 3: Cross multiply
    1,035.60x = 1,428.45 × 720.36
  4. Step 4: Simplify right side
    1,035.60x = 1,028,998.24
  5. Step 5: Solve for x
    x = 1,028,998.24/1,035.60
  6. Step 6: Final answer
    x = 993.63

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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.