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Finding the Fourth Proportional to 623.76, 935.64 and 239

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Solution

The fourth proportional to 623.76, 935.64 and 239 is: 358.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.76 : 935.64 = 239 : x
  2. Step 2: Convert to fraction form
    623.76/935.64 = 239/x
  3. Step 3: Cross multiply
    623.76x = 935.64 × 239
  4. Step 4: Simplify right side
    623.76x = 223,617.96
  5. Step 5: Solve for x
    x = 223,617.96/623.76
  6. Step 6: Final answer
    x = 358.50

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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.