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Finding the Fourth Proportional to 457.03, 685.71 and 328.06

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Solution

The fourth proportional to 457.03, 685.71 and 328.06 is: 492.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.03 : 685.71 = 328.06 : x
  2. Step 2: Convert to fraction form
    457.03/685.71 = 328.06/x
  3. Step 3: Cross multiply
    457.03x = 685.71 × 328.06
  4. Step 4: Simplify right side
    457.03x = 224,954.02
  5. Step 5: Solve for x
    x = 224,954.02/457.03
  6. Step 6: Final answer
    x = 492.21

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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.