Home / 765,515.91-1,145,465.49-638,843.46

Finding the Fourth Proportional to 765,515.91, 1,145,465.49 and 638,843.46

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Solution

The fourth proportional to 765,515.91, 1,145,465.49 and 638,843.46 is: 955,921.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,515.91 : 1,145,465.49 = 638,843.46 : x
  2. Step 2: Convert to fraction form
    765,515.91/1,145,465.49 = 638,843.46/x
  3. Step 3: Cross multiply
    765,515.91x = 1,145,465.49 × 638,843.46
  4. Step 4: Simplify right side
    765,515.91x = 731,773,136,942.20
  5. Step 5: Solve for x
    x = 731,773,136,942.20/765,515.91
  6. Step 6: Final answer
    x = 955,921.53

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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.