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Finding the Fourth Proportional to 693.97, 1,041.14 and 328.75

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Solution

The fourth proportional to 693.97, 1,041.14 and 328.75 is: 493.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.97 : 1,041.14 = 328.75 : x
  2. Step 2: Convert to fraction form
    693.97/1,041.14 = 328.75/x
  3. Step 3: Cross multiply
    693.97x = 1,041.14 × 328.75
  4. Step 4: Simplify right side
    693.97x = 342,274.78
  5. Step 5: Solve for x
    x = 342,274.78/693.97
  6. Step 6: Final answer
    x = 493.21

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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.