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Finding the Fourth Proportional to 719.99, 993.58 and 400.96

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Solution

The fourth proportional to 719.99, 993.58 and 400.96 is: 553.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.99 : 993.58 = 400.96 : x
  2. Step 2: Convert to fraction form
    719.99/993.58 = 400.96/x
  3. Step 3: Cross multiply
    719.99x = 993.58 × 400.96
  4. Step 4: Simplify right side
    719.99x = 398,380.49
  5. Step 5: Solve for x
    x = 398,380.49/719.99
  6. Step 6: Final answer
    x = 553.31

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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.