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Finding the Fourth Proportional to 818.89, 1,130.17 and 464.92

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Solution

The fourth proportional to 818.89, 1,130.17 and 464.92 is: 641.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.89 : 1,130.17 = 464.92 : x
  2. Step 2: Convert to fraction form
    818.89/1,130.17 = 464.92/x
  3. Step 3: Cross multiply
    818.89x = 1,130.17 × 464.92
  4. Step 4: Simplify right side
    818.89x = 525,439.42
  5. Step 5: Solve for x
    x = 525,439.42/818.89
  6. Step 6: Final answer
    x = 641.65

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1.5x scale

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.