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Finding the Fourth Proportional to 572,281.15, 856,751.74 and 428,822.83

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Solution

The fourth proportional to 572,281.15, 856,751.74 and 428,822.83 is: 641,982.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,281.15 : 856,751.74 = 428,822.83 : x
  2. Step 2: Convert to fraction form
    572,281.15/856,751.74 = 428,822.83/x
  3. Step 3: Cross multiply
    572,281.15x = 856,751.74 × 428,822.83
  4. Step 4: Simplify right side
    572,281.15x = 367,394,705,754.22
  5. Step 5: Solve for x
    x = 367,394,705,754.22/572,281.15
  6. Step 6: Final answer
    x = 641,982.89

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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.