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Finding the Fourth Proportional to 435.11, 652.91 and 431.58

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Solution

The fourth proportional to 435.11, 652.91 and 431.58 is: 647.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.11 : 652.91 = 431.58 : x
  2. Step 2: Convert to fraction form
    435.11/652.91 = 431.58/x
  3. Step 3: Cross multiply
    435.11x = 652.91 × 431.58
  4. Step 4: Simplify right side
    435.11x = 281,783.17
  5. Step 5: Solve for x
    x = 281,783.17/435.11
  6. Step 6: Final answer
    x = 647.61

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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.