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Finding the Fourth Proportional to 953.64, 1,429.32 and 491.64

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Solution

The fourth proportional to 953.64, 1,429.32 and 491.64 is: 736.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.64 : 1,429.32 = 491.64 : x
  2. Step 2: Convert to fraction form
    953.64/1,429.32 = 491.64/x
  3. Step 3: Cross multiply
    953.64x = 1,429.32 × 491.64
  4. Step 4: Simplify right side
    953.64x = 702,710.88
  5. Step 5: Solve for x
    x = 702,710.88/953.64
  6. Step 6: Final answer
    x = 736.87

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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.