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Finding the Fourth Proportional to 419.60, 578.99 and 233.06

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Solution

The fourth proportional to 419.60, 578.99 and 233.06 is: 321.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.60 : 578.99 = 233.06 : x
  2. Step 2: Convert to fraction form
    419.60/578.99 = 233.06/x
  3. Step 3: Cross multiply
    419.60x = 578.99 × 233.06
  4. Step 4: Simplify right side
    419.60x = 134,937.10
  5. Step 5: Solve for x
    x = 134,937.10/419.60
  6. Step 6: Final answer
    x = 321.58

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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.