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Finding the Fourth Proportional to 712.83, 983.20 and 503.44

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Solution

The fourth proportional to 712.83, 983.20 and 503.44 is: 694.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.83 : 983.20 = 503.44 : x
  2. Step 2: Convert to fraction form
    712.83/983.20 = 503.44/x
  3. Step 3: Cross multiply
    712.83x = 983.20 × 503.44
  4. Step 4: Simplify right side
    712.83x = 494,982.21
  5. Step 5: Solve for x
    x = 494,982.21/712.83
  6. Step 6: Final answer
    x = 694.39

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Double scale
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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.