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Finding the Fourth Proportional to 528.54, 727.34 and 487.50

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Solution

The fourth proportional to 528.54, 727.34 and 487.50 is: 670.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.54 : 727.34 = 487.50 : x
  2. Step 2: Convert to fraction form
    528.54/727.34 = 487.50/x
  3. Step 3: Cross multiply
    528.54x = 727.34 × 487.50
  4. Step 4: Simplify right side
    528.54x = 354,575.81
  5. Step 5: Solve for x
    x = 354,575.81/528.54
  6. Step 6: Final answer
    x = 670.86

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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.