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Finding the Fourth Proportional to 818.42, 1,129.46 and 464.46

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Solution

The fourth proportional to 818.42, 1,129.46 and 464.46 is: 640.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.42 : 1,129.46 = 464.46 : x
  2. Step 2: Convert to fraction form
    818.42/1,129.46 = 464.46/x
  3. Step 3: Cross multiply
    818.42x = 1,129.46 × 464.46
  4. Step 4: Simplify right side
    818.42x = 524,586.67
  5. Step 5: Solve for x
    x = 524,586.67/818.42
  6. Step 6: Final answer
    x = 640.98

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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.