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Finding the Fourth Proportional to 719.99, 993.98 and 440.29

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Solution

The fourth proportional to 719.99, 993.98 and 440.29 is: 607.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.99 : 993.98 = 440.29 : x
  2. Step 2: Convert to fraction form
    719.99/993.98 = 440.29/x
  3. Step 3: Cross multiply
    719.99x = 993.98 × 440.29
  4. Step 4: Simplify right side
    719.99x = 437,639.45
  5. Step 5: Solve for x
    x = 437,639.45/719.99
  6. Step 6: Final answer
    x = 607.84

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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.