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Finding the Fourth Proportional to 379,050.40, 523,086.08 and 209,280.80

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Solution

The fourth proportional to 379,050.40, 523,086.08 and 209,280.80 is: 288,805.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,050.40 : 523,086.08 = 209,280.80 : x
  2. Step 2: Convert to fraction form
    379,050.40/523,086.08 = 209,280.80/x
  3. Step 3: Cross multiply
    379,050.40x = 523,086.08 × 209,280.80
  4. Step 4: Simplify right side
    379,050.40x = 109,471,873,291.26
  5. Step 5: Solve for x
    x = 109,471,873,291.26/379,050.40
  6. Step 6: Final answer
    x = 288,805.59

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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.