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Finding the Fourth Proportional to 561,520.28, 774,898.07 and 319,825.35

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Solution

The fourth proportional to 561,520.28, 774,898.07 and 319,825.35 is: 441,359.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,520.28 : 774,898.07 = 319,825.35 : x
  2. Step 2: Convert to fraction form
    561,520.28/774,898.07 = 319,825.35/x
  3. Step 3: Cross multiply
    561,520.28x = 774,898.07 × 319,825.35
  4. Step 4: Simplify right side
    561,520.28x = 247,832,044,852.95
  5. Step 5: Solve for x
    x = 247,832,044,852.95/561,520.28
  6. Step 6: Final answer
    x = 441,359.03

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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.