Home / 765,669.91-1,056,631.61-421,512.66

Finding the Fourth Proportional to 765,669.91, 1,056,631.61 and 421,512.66

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Solution

The fourth proportional to 765,669.91, 1,056,631.61 and 421,512.66 is: 581,691.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,669.91 : 1,056,631.61 = 421,512.66 : x
  2. Step 2: Convert to fraction form
    765,669.91/1,056,631.61 = 421,512.66/x
  3. Step 3: Cross multiply
    765,669.91x = 1,056,631.61 × 421,512.66
  4. Step 4: Simplify right side
    765,669.91x = 445,383,599,245.96
  5. Step 5: Solve for x
    x = 445,383,599,245.96/765,669.91
  6. Step 6: Final answer
    x = 581,691.39

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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.