Home / 765,519.74-1,056,408.94-421,348.31

Finding the Fourth Proportional to 765,519.74, 1,056,408.94 and 421,348.31

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Solution

The fourth proportional to 765,519.74, 1,056,408.94 and 421,348.31 is: 581,456.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,519.74 : 1,056,408.94 = 421,348.31 : x
  2. Step 2: Convert to fraction form
    765,519.74/1,056,408.94 = 421,348.31/x
  3. Step 3: Cross multiply
    765,519.74x = 1,056,408.94 × 421,348.31
  4. Step 4: Simplify right side
    765,519.74x = 445,116,124,316.28
  5. Step 5: Solve for x
    x = 445,116,124,316.28/765,519.74
  6. Step 6: Final answer
    x = 581,456.10

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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.