Home / 765,679.82-1,056,619.52-421,512.95

Finding the Fourth Proportional to 765,679.82, 1,056,619.52 and 421,512.95

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Solution

The fourth proportional to 765,679.82, 1,056,619.52 and 421,512.95 is: 581,677.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,679.82 : 1,056,619.52 = 421,512.95 : x
  2. Step 2: Convert to fraction form
    765,679.82/1,056,619.52 = 421,512.95/x
  3. Step 3: Cross multiply
    765,679.82x = 1,056,619.52 × 421,512.95
  4. Step 4: Simplify right side
    765,679.82x = 445,378,803,512.12
  5. Step 5: Solve for x
    x = 445,378,803,512.12/765,679.82
  6. Step 6: Final answer
    x = 581,677.61

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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.