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Finding the Fourth Proportional to 623.72, 935.69 and 258.77

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Solution

The fourth proportional to 623.72, 935.69 and 258.77 is: 388.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.72 : 935.69 = 258.77 : x
  2. Step 2: Convert to fraction form
    623.72/935.69 = 258.77/x
  3. Step 3: Cross multiply
    623.72x = 935.69 × 258.77
  4. Step 4: Simplify right side
    623.72x = 242,128.50
  5. Step 5: Solve for x
    x = 242,128.50/623.72
  6. Step 6: Final answer
    x = 388.20

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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.