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Finding the Fourth Proportional to 953.14, 1,429.09 and 405.17

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Solution

The fourth proportional to 953.14, 1,429.09 and 405.17 is: 607.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.14 : 1,429.09 = 405.17 : x
  2. Step 2: Convert to fraction form
    953.14/1,429.09 = 405.17/x
  3. Step 3: Cross multiply
    953.14x = 1,429.09 × 405.17
  4. Step 4: Simplify right side
    953.14x = 579,024.40
  5. Step 5: Solve for x
    x = 579,024.40/953.14
  6. Step 6: Final answer
    x = 607.49

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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.