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Finding the Fourth Proportional to 434.72, 599.90 and 257.64

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Solution

The fourth proportional to 434.72, 599.90 and 257.64 is: 355.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.72 : 599.90 = 257.64 : x
  2. Step 2: Convert to fraction form
    434.72/599.90 = 257.64/x
  3. Step 3: Cross multiply
    434.72x = 599.90 × 257.64
  4. Step 4: Simplify right side
    434.72x = 154,558.24
  5. Step 5: Solve for x
    x = 154,558.24/434.72
  6. Step 6: Final answer
    x = 355.54

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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.