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Finding the Fourth Proportional to 846.64, 1,269.87 and 401.80

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Solution

The fourth proportional to 846.64, 1,269.87 and 401.80 is: 602.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.64 : 1,269.87 = 401.80 : x
  2. Step 2: Convert to fraction form
    846.64/1,269.87 = 401.80/x
  3. Step 3: Cross multiply
    846.64x = 1,269.87 × 401.80
  4. Step 4: Simplify right side
    846.64x = 510,233.77
  5. Step 5: Solve for x
    x = 510,233.77/846.64
  6. Step 6: Final answer
    x = 602.66

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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.