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Finding the Fourth Proportional to 1,004.76, 1,388.34 and 829.80

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Solution

The fourth proportional to 1,004.76, 1,388.34 and 829.80 is: 1,146.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,004.76 : 1,388.34 = 829.80 : x
  2. Step 2: Convert to fraction form
    1,004.76/1,388.34 = 829.80/x
  3. Step 3: Cross multiply
    1,004.76x = 1,388.34 × 829.80
  4. Step 4: Simplify right side
    1,004.76x = 1,152,044.53
  5. Step 5: Solve for x
    x = 1,152,044.53/1,004.76
  6. Step 6: Final answer
    x = 1,146.59

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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.