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Finding the Fourth Proportional to 529.96, 731.10 and 381.40

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Solution

The fourth proportional to 529.96, 731.10 and 381.40 is: 526.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.96 : 731.10 = 381.40 : x
  2. Step 2: Convert to fraction form
    529.96/731.10 = 381.40/x
  3. Step 3: Cross multiply
    529.96x = 731.10 × 381.40
  4. Step 4: Simplify right side
    529.96x = 278,841.54
  5. Step 5: Solve for x
    x = 278,841.54/529.96
  6. Step 6: Final answer
    x = 526.16

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.