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Finding the Fourth Proportional to 719.84, 993.60 and 486.96

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Solution

The fourth proportional to 719.84, 993.60 and 486.96 is: 672.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.84 : 993.60 = 486.96 : x
  2. Step 2: Convert to fraction form
    719.84/993.60 = 486.96/x
  3. Step 3: Cross multiply
    719.84x = 993.60 × 486.96
  4. Step 4: Simplify right side
    719.84x = 483,843.46
  5. Step 5: Solve for x
    x = 483,843.46/719.84
  6. Step 6: Final answer
    x = 672.15

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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.