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Finding the Fourth Proportional to 890,997.80, 1,337,637.18 and 765,441.32

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Solution

The fourth proportional to 890,997.80, 1,337,637.18 and 765,441.32 is: 1,149,141.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,997.80 : 1,337,637.18 = 765,441.32 : x
  2. Step 2: Convert to fraction form
    890,997.80/1,337,637.18 = 765,441.32/x
  3. Step 3: Cross multiply
    890,997.80x = 1,337,637.18 × 765,441.32
  4. Step 4: Simplify right side
    890,997.80x = 1,023,882,768,740.28
  5. Step 5: Solve for x
    x = 1,023,882,768,740.28/890,997.80
  6. Step 6: Final answer
    x = 1,149,141.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.