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Finding the Fourth Proportional to 722.76, 997.28 and 407.98

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Solution

The fourth proportional to 722.76, 997.28 and 407.98 is: 562.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.76 : 997.28 = 407.98 : x
  2. Step 2: Convert to fraction form
    722.76/997.28 = 407.98/x
  3. Step 3: Cross multiply
    722.76x = 997.28 × 407.98
  4. Step 4: Simplify right side
    722.76x = 406,871.03
  5. Step 5: Solve for x
    x = 406,871.03/722.76
  6. Step 6: Final answer
    x = 562.94

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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.