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Finding the Fourth Proportional to 719.74, 993.09 and 457.30

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Solution

The fourth proportional to 719.74, 993.09 and 457.30 is: 630.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.74 : 993.09 = 457.30 : x
  2. Step 2: Convert to fraction form
    719.74/993.09 = 457.30/x
  3. Step 3: Cross multiply
    719.74x = 993.09 × 457.30
  4. Step 4: Simplify right side
    719.74x = 454,140.06
  5. Step 5: Solve for x
    x = 454,140.06/719.74
  6. Step 6: Final answer
    x = 630.98

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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.