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Finding the Fourth Proportional to 325.56, 486.24 and 257.16

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Solution

The fourth proportional to 325.56, 486.24 and 257.16 is: 384.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.56 : 486.24 = 257.16 : x
  2. Step 2: Convert to fraction form
    325.56/486.24 = 257.16/x
  3. Step 3: Cross multiply
    325.56x = 486.24 × 257.16
  4. Step 4: Simplify right side
    325.56x = 125,041.48
  5. Step 5: Solve for x
    x = 125,041.48/325.56
  6. Step 6: Final answer
    x = 384.08

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.