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Finding the Fourth Proportional to 875.50, 1,313.26 and 327.57

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Solution

The fourth proportional to 875.50, 1,313.26 and 327.57 is: 491.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.50 : 1,313.26 = 327.57 : x
  2. Step 2: Convert to fraction form
    875.50/1,313.26 = 327.57/x
  3. Step 3: Cross multiply
    875.50x = 1,313.26 × 327.57
  4. Step 4: Simplify right side
    875.50x = 430,184.58
  5. Step 5: Solve for x
    x = 430,184.58/875.50
  6. Step 6: Final answer
    x = 491.36

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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.