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Finding the Fourth Proportional to 387,021.90, 580,532.85 and 235,462.80

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Solution

The fourth proportional to 387,021.90, 580,532.85 and 235,462.80 is: 353,194.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,021.90 : 580,532.85 = 235,462.80 : x
  2. Step 2: Convert to fraction form
    387,021.90/580,532.85 = 235,462.80/x
  3. Step 3: Cross multiply
    387,021.90x = 580,532.85 × 235,462.80
  4. Step 4: Simplify right side
    387,021.90x = 136,693,890,352.98
  5. Step 5: Solve for x
    x = 136,693,890,352.98/387,021.90
  6. Step 6: Final answer
    x = 353,194.20

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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.