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Finding the Fourth Proportional to 1,004.48, 1,386.65 and 755.89

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Solution

The fourth proportional to 1,004.48, 1,386.65 and 755.89 is: 1,043.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,004.48 : 1,386.65 = 755.89 : x
  2. Step 2: Convert to fraction form
    1,004.48/1,386.65 = 755.89/x
  3. Step 3: Cross multiply
    1,004.48x = 1,386.65 × 755.89
  4. Step 4: Simplify right side
    1,004.48x = 1,048,147.62
  5. Step 5: Solve for x
    x = 1,048,147.62/1,004.48
  6. Step 6: Final answer
    x = 1,043.48

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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.