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Finding the Fourth Proportional to 813.39, 1,122.48 and 464.10

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Solution

The fourth proportional to 813.39, 1,122.48 and 464.10 is: 640.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    813.39 : 1,122.48 = 464.10 : x
  2. Step 2: Convert to fraction form
    813.39/1,122.48 = 464.10/x
  3. Step 3: Cross multiply
    813.39x = 1,122.48 × 464.10
  4. Step 4: Simplify right side
    813.39x = 520,942.97
  5. Step 5: Solve for x
    x = 520,942.97/813.39
  6. Step 6: Final answer
    x = 640.46

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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.