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Finding the Fourth Proportional to 818.04, 1,226.98 and 407.10

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Solution

The fourth proportional to 818.04, 1,226.98 and 407.10 is: 610.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.04 : 1,226.98 = 407.10 : x
  2. Step 2: Convert to fraction form
    818.04/1,226.98 = 407.10/x
  3. Step 3: Cross multiply
    818.04x = 1,226.98 × 407.10
  4. Step 4: Simplify right side
    818.04x = 499,503.56
  5. Step 5: Solve for x
    x = 499,503.56/818.04
  6. Step 6: Final answer
    x = 610.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.