Home / 765,150.06-1,055,915.18-420,990.51

Finding the Fourth Proportional to 765,150.06, 1,055,915.18 and 420,990.51

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Solution

The fourth proportional to 765,150.06, 1,055,915.18 and 420,990.51 is: 580,971.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,150.06 : 1,055,915.18 = 420,990.51 : x
  2. Step 2: Convert to fraction form
    765,150.06/1,055,915.18 = 420,990.51/x
  3. Step 3: Cross multiply
    765,150.06x = 1,055,915.18 × 420,990.51
  4. Step 4: Simplify right side
    765,150.06x = 444,530,270,144.94
  5. Step 5: Solve for x
    x = 444,530,270,144.94/765,150.06
  6. Step 6: Final answer
    x = 580,971.36

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1.5x scale

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.