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Finding the Fourth Proportional to 572,179.86, 789,425.73 and 330,430.50

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Solution

The fourth proportional to 572,179.86, 789,425.73 and 330,430.50 is: 455,888.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,179.86 : 789,425.73 = 330,430.50 : x
  2. Step 2: Convert to fraction form
    572,179.86/789,425.73 = 330,430.50/x
  3. Step 3: Cross multiply
    572,179.86x = 789,425.73 × 330,430.50
  4. Step 4: Simplify right side
    572,179.86x = 260,850,338,676.77
  5. Step 5: Solve for x
    x = 260,850,338,676.77/572,179.86
  6. Step 6: Final answer
    x = 455,888.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.