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Finding the Fourth Proportional to 561,370.21, 774,698.31 and 319,653.76

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Solution

The fourth proportional to 561,370.21, 774,698.31 and 319,653.76 is: 441,126.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,370.21 : 774,698.31 = 319,653.76 : x
  2. Step 2: Convert to fraction form
    561,370.21/774,698.31 = 319,653.76/x
  3. Step 3: Cross multiply
    561,370.21x = 774,698.31 × 319,653.76
  4. Step 4: Simplify right side
    561,370.21x = 247,635,227,172.96
  5. Step 5: Solve for x
    x = 247,635,227,172.96/561,370.21
  6. Step 6: Final answer
    x = 441,126.41

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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.