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Finding the Fourth Proportional to 561,820.35, 775,315.34 and 307,171.54

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Solution

The fourth proportional to 561,820.35, 775,315.34 and 307,171.54 is: 423,898.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,820.35 : 775,315.34 = 307,171.54 : x
  2. Step 2: Convert to fraction form
    561,820.35/775,315.34 = 307,171.54/x
  3. Step 3: Cross multiply
    561,820.35x = 775,315.34 × 307,171.54
  4. Step 4: Simplify right side
    561,820.35x = 238,154,809,286.44
  5. Step 5: Solve for x
    x = 238,154,809,286.44/561,820.35
  6. Step 6: Final answer
    x = 423,898.51

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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.