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Finding the Fourth Proportional to 623.80, 935.68 and 253.70

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Solution

The fourth proportional to 623.80, 935.68 and 253.70 is: 380.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.80 : 935.68 = 253.70 : x
  2. Step 2: Convert to fraction form
    623.80/935.68 = 253.70/x
  3. Step 3: Cross multiply
    623.80x = 935.68 × 253.70
  4. Step 4: Simplify right side
    623.80x = 237,382.02
  5. Step 5: Solve for x
    x = 237,382.02/623.80
  6. Step 6: Final answer
    x = 380.54

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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.