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Finding the Fourth Proportional to 383,995.55, 529,926.59 and 209,575.28

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Solution

The fourth proportional to 383,995.55, 529,926.59 and 209,575.28 is: 289,220.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,995.55 : 529,926.59 = 209,575.28 : x
  2. Step 2: Convert to fraction form
    383,995.55/529,926.59 = 209,575.28/x
  3. Step 3: Cross multiply
    383,995.55x = 529,926.59 × 209,575.28
  4. Step 4: Simplify right side
    383,995.55x = 111,059,513,478.70
  5. Step 5: Solve for x
    x = 111,059,513,478.70/383,995.55
  6. Step 6: Final answer
    x = 289,220.83

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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.