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Finding the Fourth Proportional to 722.71, 997.35 and 407.99

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Solution

The fourth proportional to 722.71, 997.35 and 407.99 is: 563.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.71 : 997.35 = 407.99 : x
  2. Step 2: Convert to fraction form
    722.71/997.35 = 407.99/x
  3. Step 3: Cross multiply
    722.71x = 997.35 × 407.99
  4. Step 4: Simplify right side
    722.71x = 406,908.43
  5. Step 5: Solve for x
    x = 406,908.43/722.71
  6. Step 6: Final answer
    x = 563.03

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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.