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Finding the Fourth Proportional to 585.58, 878.38 and 423.58

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Solution

The fourth proportional to 585.58, 878.38 and 423.58 is: 635.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.58 : 878.38 = 423.58 : x
  2. Step 2: Convert to fraction form
    585.58/878.38 = 423.58/x
  3. Step 3: Cross multiply
    585.58x = 878.38 × 423.58
  4. Step 4: Simplify right side
    585.58x = 372,064.20
  5. Step 5: Solve for x
    x = 372,064.20/585.58
  6. Step 6: Final answer
    x = 635.38

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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.