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Finding the Fourth Proportional to 913.59, 1,370.04 and 328.43

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Solution

The fourth proportional to 913.59, 1,370.04 and 328.43 is: 492.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    913.59 : 1,370.04 = 328.43 : x
  2. Step 2: Convert to fraction form
    913.59/1,370.04 = 328.43/x
  3. Step 3: Cross multiply
    913.59x = 1,370.04 × 328.43
  4. Step 4: Simplify right side
    913.59x = 449,955.39
  5. Step 5: Solve for x
    x = 449,955.39/913.59
  6. Step 6: Final answer
    x = 492.51

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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.