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Finding the Fourth Proportional to 561,379.48, 774,694.56 and 306,725.20

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Solution

The fourth proportional to 561,379.48, 774,694.56 and 306,725.20 is: 423,275.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,379.48 : 774,694.56 = 306,725.20 : x
  2. Step 2: Convert to fraction form
    561,379.48/774,694.56 = 306,725.20/x
  3. Step 3: Cross multiply
    561,379.48x = 774,694.56 × 306,725.20
  4. Step 4: Simplify right side
    561,379.48x = 237,618,343,854.91
  5. Step 5: Solve for x
    x = 237,618,343,854.91/561,379.48
  6. Step 6: Final answer
    x = 423,275.79

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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.