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Finding the Fourth Proportional to 1,059.31, 1,588.97 and 328.87

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Solution

The fourth proportional to 1,059.31, 1,588.97 and 328.87 is: 493.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,059.31 : 1,588.97 = 328.87 : x
  2. Step 2: Convert to fraction form
    1,059.31/1,588.97 = 328.87/x
  3. Step 3: Cross multiply
    1,059.31x = 1,588.97 × 328.87
  4. Step 4: Simplify right side
    1,059.31x = 522,554.97
  5. Step 5: Solve for x
    x = 522,554.97/1,059.31
  6. Step 6: Final answer
    x = 493.30

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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.