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Finding the Fourth Proportional to 379,159.37, 523,243.49 and 215,807.90

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Solution

The fourth proportional to 379,159.37, 523,243.49 and 215,807.90 is: 297,816.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,159.37 : 523,243.49 = 215,807.90 : x
  2. Step 2: Convert to fraction form
    379,159.37/523,243.49 = 215,807.90/x
  3. Step 3: Cross multiply
    379,159.37x = 523,243.49 × 215,807.90
  4. Step 4: Simplify right side
    379,159.37x = 112,920,076,132.50
  5. Step 5: Solve for x
    x = 112,920,076,132.50/379,159.37
  6. Step 6: Final answer
    x = 297,816.92

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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.