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Finding the Fourth Proportional to 877.41, 1,315.73 and 329.21

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Solution

The fourth proportional to 877.41, 1,315.73 and 329.21 is: 493.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.41 : 1,315.73 = 329.21 : x
  2. Step 2: Convert to fraction form
    877.41/1,315.73 = 329.21/x
  3. Step 3: Cross multiply
    877.41x = 1,315.73 × 329.21
  4. Step 4: Simplify right side
    877.41x = 433,151.47
  5. Step 5: Solve for x
    x = 433,151.47/877.41
  6. Step 6: Final answer
    x = 493.67

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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.