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Finding the Fourth Proportional to 674.82, 931.50 and 528.48

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Solution

The fourth proportional to 674.82, 931.50 and 528.48 is: 729.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.82 : 931.50 = 528.48 : x
  2. Step 2: Convert to fraction form
    674.82/931.50 = 528.48/x
  3. Step 3: Cross multiply
    674.82x = 931.50 × 528.48
  4. Step 4: Simplify right side
    674.82x = 492,279.12
  5. Step 5: Solve for x
    x = 492,279.12/674.82
  6. Step 6: Final answer
    x = 729.50

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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.