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Finding the Fourth Proportional to 829.04, 1,143.24 and 518

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Solution

The fourth proportional to 829.04, 1,143.24 and 518 is: 714.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    829.04 : 1,143.24 = 518 : x
  2. Step 2: Convert to fraction form
    829.04/1,143.24 = 518/x
  3. Step 3: Cross multiply
    829.04x = 1,143.24 × 518
  4. Step 4: Simplify right side
    829.04x = 592,198.32
  5. Step 5: Solve for x
    x = 592,198.32/829.04
  6. Step 6: Final answer
    x = 714.32

Related Problems

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Double scale
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Similar ratio
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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.