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Finding the Fourth Proportional to 570,640.80, 856,575.60 and 321,808.80

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Solution

The fourth proportional to 570,640.80, 856,575.60 and 321,808.80 is: 483,059.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,640.80 : 856,575.60 = 321,808.80 : x
  2. Step 2: Convert to fraction form
    570,640.80/856,575.60 = 321,808.80/x
  3. Step 3: Cross multiply
    570,640.80x = 856,575.60 × 321,808.80
  4. Step 4: Simplify right side
    570,640.80x = 275,653,565,945.28
  5. Step 5: Solve for x
    x = 275,653,565,945.28/570,640.80
  6. Step 6: Final answer
    x = 483,059.69

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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.