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Finding the Fourth Proportional to 502.51, 693.81 and 328.15

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Solution

The fourth proportional to 502.51, 693.81 and 328.15 is: 453.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.51 : 693.81 = 328.15 : x
  2. Step 2: Convert to fraction form
    502.51/693.81 = 328.15/x
  3. Step 3: Cross multiply
    502.51x = 693.81 × 328.15
  4. Step 4: Simplify right side
    502.51x = 227,673.75
  5. Step 5: Solve for x
    x = 227,673.75/502.51
  6. Step 6: Final answer
    x = 453.07

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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.