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Finding the Fourth Proportional to 953.87, 1,429.59 and 405.91

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Solution

The fourth proportional to 953.87, 1,429.59 and 405.91 is: 608.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.87 : 1,429.59 = 405.91 : x
  2. Step 2: Convert to fraction form
    953.87/1,429.59 = 405.91/x
  3. Step 3: Cross multiply
    953.87x = 1,429.59 × 405.91
  4. Step 4: Simplify right side
    953.87x = 580,277.73
  5. Step 5: Solve for x
    x = 580,277.73/953.87
  6. Step 6: Final answer
    x = 608.34

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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.