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Finding the Fourth Proportional to 455,890.20, 685,001.70 and 404,568.60

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Solution

The fourth proportional to 455,890.20, 685,001.70 and 404,568.60 is: 607,887.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,890.20 : 685,001.70 = 404,568.60 : x
  2. Step 2: Convert to fraction form
    455,890.20/685,001.70 = 404,568.60/x
  3. Step 3: Cross multiply
    455,890.20x = 685,001.70 × 404,568.60
  4. Step 4: Simplify right side
    455,890.20x = 277,130,178,766.62
  5. Step 5: Solve for x
    x = 277,130,178,766.62/455,890.20
  6. Step 6: Final answer
    x = 607,887.99

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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.