Home / 765,956.40-1,057,010.90-421,785.15

Finding the Fourth Proportional to 765,956.40, 1,057,010.90 and 421,785.15

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Solution

The fourth proportional to 765,956.40, 1,057,010.90 and 421,785.15 is: 582,058.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,956.40 : 1,057,010.90 = 421,785.15 : x
  2. Step 2: Convert to fraction form
    765,956.40/1,057,010.90 = 421,785.15/x
  3. Step 3: Cross multiply
    765,956.40x = 1,057,010.90 × 421,785.15
  4. Step 4: Simplify right side
    765,956.40x = 445,831,498,899.21
  5. Step 5: Solve for x
    x = 445,831,498,899.21/765,956.40
  6. Step 6: Final answer
    x = 582,058.59

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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.