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Finding the Fourth Proportional to 719.79, 993.62 and 454.47

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Solution

The fourth proportional to 719.79, 993.62 and 454.47 is: 627.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.79 : 993.62 = 454.47 : x
  2. Step 2: Convert to fraction form
    719.79/993.62 = 454.47/x
  3. Step 3: Cross multiply
    719.79x = 993.62 × 454.47
  4. Step 4: Simplify right side
    719.79x = 451,570.48
  5. Step 5: Solve for x
    x = 451,570.48/719.79
  6. Step 6: Final answer
    x = 627.36

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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.