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Finding the Fourth Proportional to 387,282.80, 580,924.20 and 216,040.70

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Solution

The fourth proportional to 387,282.80, 580,924.20 and 216,040.70 is: 324,061.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,282.80 : 580,924.20 = 216,040.70 : x
  2. Step 2: Convert to fraction form
    387,282.80/580,924.20 = 216,040.70/x
  3. Step 3: Cross multiply
    387,282.80x = 580,924.20 × 216,040.70
  4. Step 4: Simplify right side
    387,282.80x = 125,503,270,814.94
  5. Step 5: Solve for x
    x = 125,503,270,814.94/387,282.80
  6. Step 6: Final answer
    x = 324,061.05

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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.