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Finding the Fourth Proportional to 388,661.95, 581,676.09 and 238,997.02

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Solution

The fourth proportional to 388,661.95, 581,676.09 and 238,997.02 is: 357,685.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,661.95 : 581,676.09 = 238,997.02 : x
  2. Step 2: Convert to fraction form
    388,661.95/581,676.09 = 238,997.02/x
  3. Step 3: Cross multiply
    388,661.95x = 581,676.09 × 238,997.02
  4. Step 4: Simplify right side
    388,661.95x = 139,018,852,115.25
  5. Step 5: Solve for x
    x = 139,018,852,115.25/388,661.95
  6. Step 6: Final answer
    x = 357,685.78

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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.