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Finding the Fourth Proportional to 719.82, 993.36 and 458.31

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Solution

The fourth proportional to 719.82, 993.36 and 458.31 is: 632.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.82 : 993.36 = 458.31 : x
  2. Step 2: Convert to fraction form
    719.82/993.36 = 458.31/x
  3. Step 3: Cross multiply
    719.82x = 993.36 × 458.31
  4. Step 4: Simplify right side
    719.82x = 455,266.82
  5. Step 5: Solve for x
    x = 455,266.82/719.82
  6. Step 6: Final answer
    x = 632.47

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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.