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Finding the Fourth Proportional to 641,992.56, 885,655.80 and 415,710.96

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Solution

The fourth proportional to 641,992.56, 885,655.80 and 415,710.96 is: 573,490.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,992.56 : 885,655.80 = 415,710.96 : x
  2. Step 2: Convert to fraction form
    641,992.56/885,655.80 = 415,710.96/x
  3. Step 3: Cross multiply
    641,992.56x = 885,655.80 × 415,710.96
  4. Step 4: Simplify right side
    641,992.56x = 368,176,822,847.57
  5. Step 5: Solve for x
    x = 368,176,822,847.57/641,992.56
  6. Step 6: Final answer
    x = 573,490.79

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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.