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Finding the Fourth Proportional to 561,393.79, 774,723.39 and 306,744.98

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Solution

The fourth proportional to 561,393.79, 774,723.39 and 306,744.98 is: 423,308.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,393.79 : 774,723.39 = 306,744.98 : x
  2. Step 2: Convert to fraction form
    561,393.79/774,723.39 = 306,744.98/x
  3. Step 3: Cross multiply
    561,393.79x = 774,723.39 × 306,744.98
  4. Step 4: Simplify right side
    561,393.79x = 237,642,505,747.17
  5. Step 5: Solve for x
    x = 237,642,505,747.17/561,393.79
  6. Step 6: Final answer
    x = 423,308.04

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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.