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Finding the Fourth Proportional to 379,583.79, 523,805.18 and 209,807.79

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Solution

The fourth proportional to 379,583.79, 523,805.18 and 209,807.79 is: 289,523.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,583.79 : 523,805.18 = 209,807.79 : x
  2. Step 2: Convert to fraction form
    379,583.79/523,805.18 = 209,807.79/x
  3. Step 3: Cross multiply
    379,583.79x = 523,805.18 × 209,807.79
  4. Step 4: Simplify right side
    379,583.79x = 109,898,406,157.31
  5. Step 5: Solve for x
    x = 109,898,406,157.31/379,583.79
  6. Step 6: Final answer
    x = 289,523.44

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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.