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Finding the Fourth Proportional to 953.96, 1,429.88 and 406.40

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Solution

The fourth proportional to 953.96, 1,429.88 and 406.40 is: 609.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.96 : 1,429.88 = 406.40 : x
  2. Step 2: Convert to fraction form
    953.96/1,429.88 = 406.40/x
  3. Step 3: Cross multiply
    953.96x = 1,429.88 × 406.40
  4. Step 4: Simplify right side
    953.96x = 581,103.23
  5. Step 5: Solve for x
    x = 581,103.23/953.96
  6. Step 6: Final answer
    x = 609.15

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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.