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Finding the Fourth Proportional to 528.56, 727.56 and 480.56

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Solution

The fourth proportional to 528.56, 727.56 and 480.56 is: 661.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.56 : 727.56 = 480.56 : x
  2. Step 2: Convert to fraction form
    528.56/727.56 = 480.56/x
  3. Step 3: Cross multiply
    528.56x = 727.56 × 480.56
  4. Step 4: Simplify right side
    528.56x = 349,636.23
  5. Step 5: Solve for x
    x = 349,636.23/528.56
  6. Step 6: Final answer
    x = 661.49

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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.