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Finding the Fourth Proportional to 388,674.45, 581,694.86 and 239,009.53

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Solution

The fourth proportional to 388,674.45, 581,694.86 and 239,009.53 is: 357,704.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,674.45 : 581,694.86 = 239,009.53 : x
  2. Step 2: Convert to fraction form
    388,674.45/581,694.86 = 239,009.53/x
  3. Step 3: Cross multiply
    388,674.45x = 581,694.86 × 239,009.53
  4. Step 4: Simplify right side
    388,674.45x = 139,030,613,896.97
  5. Step 5: Solve for x
    x = 139,030,613,896.97/388,674.45
  6. Step 6: Final answer
    x = 357,704.54

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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.