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Finding the Fourth Proportional to 561,687.62, 775,128.92 and 307,038.78

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Solution

The fourth proportional to 561,687.62, 775,128.92 and 307,038.78 is: 423,713.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,687.62 : 775,128.92 = 307,038.78 : x
  2. Step 2: Convert to fraction form
    561,687.62/775,128.92 = 307,038.78/x
  3. Step 3: Cross multiply
    561,687.62x = 775,128.92 × 307,038.78
  4. Step 4: Simplify right side
    561,687.62x = 237,994,636,404.32
  5. Step 5: Solve for x
    x = 237,994,636,404.32/561,687.62
  6. Step 6: Final answer
    x = 423,713.52

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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.