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Finding the Fourth Proportional to 953.92, 1,429.68 and 405.84

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Solution

The fourth proportional to 953.92, 1,429.68 and 405.84 is: 608.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.92 : 1,429.68 = 405.84 : x
  2. Step 2: Convert to fraction form
    953.92/1,429.68 = 405.84/x
  3. Step 3: Cross multiply
    953.92x = 1,429.68 × 405.84
  4. Step 4: Simplify right side
    953.92x = 580,221.33
  5. Step 5: Solve for x
    x = 580,221.33/953.92
  6. Step 6: Final answer
    x = 608.25

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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.