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Finding the Fourth Proportional to 1,418.44, 1,957.52 and 829.20

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Solution

The fourth proportional to 1,418.44, 1,957.52 and 829.20 is: 1,144.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,418.44 : 1,957.52 = 829.20 : x
  2. Step 2: Convert to fraction form
    1,418.44/1,957.52 = 829.20/x
  3. Step 3: Cross multiply
    1,418.44x = 1,957.52 × 829.20
  4. Step 4: Simplify right side
    1,418.44x = 1,623,175.58
  5. Step 5: Solve for x
    x = 1,623,175.58/1,418.44
  6. Step 6: Final answer
    x = 1,144.34

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1.5x scale

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.