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Finding the Fourth Proportional to 451,008.15, 621,892.50 and 287,405.49

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Solution

The fourth proportional to 451,008.15, 621,892.50 and 287,405.49 is: 396,301.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,008.15 : 621,892.50 = 287,405.49 : x
  2. Step 2: Convert to fraction form
    451,008.15/621,892.50 = 287,405.49/x
  3. Step 3: Cross multiply
    451,008.15x = 621,892.50 × 287,405.49
  4. Step 4: Simplify right side
    451,008.15x = 178,735,318,689.83
  5. Step 5: Solve for x
    x = 178,735,318,689.83/451,008.15
  6. Step 6: Final answer
    x = 396,301.75

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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.