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Finding the Fourth Proportional to 1,326.58, 1,989.70 and 352.62

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Solution

The fourth proportional to 1,326.58, 1,989.70 and 352.62 is: 528.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,326.58 : 1,989.70 = 352.62 : x
  2. Step 2: Convert to fraction form
    1,326.58/1,989.70 = 352.62/x
  3. Step 3: Cross multiply
    1,326.58x = 1,989.70 × 352.62
  4. Step 4: Simplify right side
    1,326.58x = 701,607.13
  5. Step 5: Solve for x
    x = 701,607.13/1,326.58
  6. Step 6: Final answer
    x = 528.89

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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.