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Finding the Fourth Proportional to 529.29, 730.35 and 381.67

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Solution

The fourth proportional to 529.29, 730.35 and 381.67 is: 526.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.29 : 730.35 = 381.67 : x
  2. Step 2: Convert to fraction form
    529.29/730.35 = 381.67/x
  3. Step 3: Cross multiply
    529.29x = 730.35 × 381.67
  4. Step 4: Simplify right side
    529.29x = 278,750.86
  5. Step 5: Solve for x
    x = 278,750.86/529.29
  6. Step 6: Final answer
    x = 526.65

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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.