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Finding the Fourth Proportional to 1,153.32, 1,729.70 and 331.58

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Solution

The fourth proportional to 1,153.32, 1,729.70 and 331.58 is: 497.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,153.32 : 1,729.70 = 331.58 : x
  2. Step 2: Convert to fraction form
    1,153.32/1,729.70 = 331.58/x
  3. Step 3: Cross multiply
    1,153.32x = 1,729.70 × 331.58
  4. Step 4: Simplify right side
    1,153.32x = 573,533.93
  5. Step 5: Solve for x
    x = 573,533.93/1,153.32
  6. Step 6: Final answer
    x = 497.29

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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.