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Finding the Fourth Proportional to 497.04, 685.61 and 328.99

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Solution

The fourth proportional to 497.04, 685.61 and 328.99 is: 453.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    497.04 : 685.61 = 328.99 : x
  2. Step 2: Convert to fraction form
    497.04/685.61 = 328.99/x
  3. Step 3: Cross multiply
    497.04x = 685.61 × 328.99
  4. Step 4: Simplify right side
    497.04x = 225,558.83
  5. Step 5: Solve for x
    x = 225,558.83/497.04
  6. Step 6: Final answer
    x = 453.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.