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Finding the Fourth Proportional to 561,520.60, 774,896.70 and 306,871.79

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Solution

The fourth proportional to 561,520.60, 774,896.70 and 306,871.79 is: 423,482.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,520.60 : 774,896.70 = 306,871.79 : x
  2. Step 2: Convert to fraction form
    561,520.60/774,896.70 = 306,871.79/x
  3. Step 3: Cross multiply
    561,520.60x = 774,896.70 × 306,871.79
  4. Step 4: Simplify right side
    561,520.60x = 237,793,933,519.61
  5. Step 5: Solve for x
    x = 237,793,933,519.61/561,520.60
  6. Step 6: Final answer
    x = 423,482.12

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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.