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Finding the Fourth Proportional to 453.01, 679.11 and 387.00

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Solution

The fourth proportional to 453.01, 679.11 and 387.00 is: 580.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.01 : 679.11 = 387.00 : x
  2. Step 2: Convert to fraction form
    453.01/679.11 = 387.00/x
  3. Step 3: Cross multiply
    453.01x = 679.11 × 387.00
  4. Step 4: Simplify right side
    453.01x = 262,812.17
  5. Step 5: Solve for x
    x = 262,812.17/453.01
  6. Step 6: Final answer
    x = 580.15

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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.