Home / 1,187.48-1,639.10-745.83

Finding the Fourth Proportional to 1,187.48, 1,639.10 and 745.83

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Solution

The fourth proportional to 1,187.48, 1,639.10 and 745.83 is: 1,029.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187.48 : 1,639.10 = 745.83 : x
  2. Step 2: Convert to fraction form
    1,187.48/1,639.10 = 745.83/x
  3. Step 3: Cross multiply
    1,187.48x = 1,639.10 × 745.83
  4. Step 4: Simplify right side
    1,187.48x = 1,222,491.82
  5. Step 5: Solve for x
    x = 1,222,491.82/1,187.48
  6. Step 6: Final answer
    x = 1,029.48

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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.