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Finding the Fourth Proportional to 561,997.80, 775,568.28 and 307,365.36

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Solution

The fourth proportional to 561,997.80, 775,568.28 and 307,365.36 is: 424,170.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,997.80 : 775,568.28 = 307,365.36 : x
  2. Step 2: Convert to fraction form
    561,997.80/775,568.28 = 307,365.36/x
  3. Step 3: Cross multiply
    561,997.80x = 775,568.28 × 307,365.36
  4. Step 4: Simplify right side
    561,997.80x = 238,382,823,586.78
  5. Step 5: Solve for x
    x = 238,382,823,586.78/561,997.80
  6. Step 6: Final answer
    x = 424,170.39

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1.5x scale

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.