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Finding the Fourth Proportional to 424,091.70, 636,137.55 and 405,890.10

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Solution

The fourth proportional to 424,091.70, 636,137.55 and 405,890.10 is: 608,835.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,091.70 : 636,137.55 = 405,890.10 : x
  2. Step 2: Convert to fraction form
    424,091.70/636,137.55 = 405,890.10/x
  3. Step 3: Cross multiply
    424,091.70x = 636,137.55 × 405,890.10
  4. Step 4: Simplify right side
    424,091.70x = 258,201,933,783.26
  5. Step 5: Solve for x
    x = 258,201,933,783.26/424,091.70
  6. Step 6: Final answer
    x = 608,835.15

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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.