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Finding the Fourth Proportional to 570,620.80, 856,545.60 and 321,788.80

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Solution

The fourth proportional to 570,620.80, 856,545.60 and 321,788.80 is: 483,029.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,620.80 : 856,545.60 = 321,788.80 : x
  2. Step 2: Convert to fraction form
    570,620.80/856,545.60 = 321,788.80/x
  3. Step 3: Cross multiply
    570,620.80x = 856,545.60 × 321,788.80
  4. Step 4: Simplify right side
    570,620.80x = 275,626,780,769.28
  5. Step 5: Solve for x
    x = 275,626,780,769.28/570,620.80
  6. Step 6: Final answer
    x = 483,029.68

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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.