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Finding the Fourth Proportional to 528.76, 729.36 and 331.93

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Solution

The fourth proportional to 528.76, 729.36 and 331.93 is: 457.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.76 : 729.36 = 331.93 : x
  2. Step 2: Convert to fraction form
    528.76/729.36 = 331.93/x
  3. Step 3: Cross multiply
    528.76x = 729.36 × 331.93
  4. Step 4: Simplify right side
    528.76x = 242,097.38
  5. Step 5: Solve for x
    x = 242,097.38/528.76
  6. Step 6: Final answer
    x = 457.86

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Double scale
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1.5x scale

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.