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Finding the Fourth Proportional to 450,624, 621,861.68 and 280,858

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Solution

The fourth proportional to 450,624, 621,861.68 and 280,858 is: 387,584.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,624 : 621,861.68 = 280,858 : x
  2. Step 2: Convert to fraction form
    450,624/621,861.68 = 280,858/x
  3. Step 3: Cross multiply
    450,624x = 621,861.68 × 280,858
  4. Step 4: Simplify right side
    450,624x = 174,654,827,721.44
  5. Step 5: Solve for x
    x = 174,654,827,721.44/450,624
  6. Step 6: Final answer
    x = 387,584.39

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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.