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Finding the Fourth Proportional to 723.45, 998.45 and 443.72

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Solution

The fourth proportional to 723.45, 998.45 and 443.72 is: 612.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    723.45 : 998.45 = 443.72 : x
  2. Step 2: Convert to fraction form
    723.45/998.45 = 443.72/x
  3. Step 3: Cross multiply
    723.45x = 998.45 × 443.72
  4. Step 4: Simplify right side
    723.45x = 443,030.02
  5. Step 5: Solve for x
    x = 443,030.02/723.45
  6. Step 6: Final answer
    x = 612.39

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Half scale
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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.