Home / 1,128.36-1,556.37-1,035.45

Finding the Fourth Proportional to 1,128.36, 1,556.37 and 1,035.45

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Solution

The fourth proportional to 1,128.36, 1,556.37 and 1,035.45 is: 1,428.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,128.36 : 1,556.37 = 1,035.45 : x
  2. Step 2: Convert to fraction form
    1,128.36/1,556.37 = 1,035.45/x
  3. Step 3: Cross multiply
    1,128.36x = 1,556.37 × 1,035.45
  4. Step 4: Simplify right side
    1,128.36x = 1,611,543.32
  5. Step 5: Solve for x
    x = 1,611,543.32/1,128.36
  6. Step 6: Final answer
    x = 1,428.22

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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.