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Finding the Fourth Proportional to 1,180.52, 1,628.23 and 1,005.11

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Solution

The fourth proportional to 1,180.52, 1,628.23 and 1,005.11 is: 1,386.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,180.52 : 1,628.23 = 1,005.11 : x
  2. Step 2: Convert to fraction form
    1,180.52/1,628.23 = 1,005.11/x
  3. Step 3: Cross multiply
    1,180.52x = 1,628.23 × 1,005.11
  4. Step 4: Simplify right side
    1,180.52x = 1,636,550.26
  5. Step 5: Solve for x
    x = 1,636,550.26/1,180.52
  6. Step 6: Final answer
    x = 1,386.30

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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.