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Finding the Fourth Proportional to 529.34, 793.19 and 431.38

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Solution

The fourth proportional to 529.34, 793.19 and 431.38 is: 646.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.34 : 793.19 = 431.38 : x
  2. Step 2: Convert to fraction form
    529.34/793.19 = 431.38/x
  3. Step 3: Cross multiply
    529.34x = 793.19 × 431.38
  4. Step 4: Simplify right side
    529.34x = 342,163.91
  5. Step 5: Solve for x
    x = 342,163.91/529.34
  6. Step 6: Final answer
    x = 646.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.