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Finding the Fourth Proportional to 561,436.80, 774,826.92 and 319,729.56

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Solution

The fourth proportional to 561,436.80, 774,826.92 and 319,729.56 is: 441,251.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,436.80 : 774,826.92 = 319,729.56 : x
  2. Step 2: Convert to fraction form
    561,436.80/774,826.92 = 319,729.56/x
  3. Step 3: Cross multiply
    561,436.80x = 774,826.92 × 319,729.56
  4. Step 4: Simplify right side
    561,436.80x = 247,735,070,207.76
  5. Step 5: Solve for x
    x = 247,735,070,207.76/561,436.80
  6. Step 6: Final answer
    x = 441,251.93

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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.