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Finding the Fourth Proportional to 765,003.33, 1,055,730.18 and 420,878.88

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Solution

The fourth proportional to 765,003.33, 1,055,730.18 and 420,878.88 is: 580,826.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,003.33 : 1,055,730.18 = 420,878.88 : x
  2. Step 2: Convert to fraction form
    765,003.33/1,055,730.18 = 420,878.88/x
  3. Step 3: Cross multiply
    765,003.33x = 1,055,730.18 × 420,878.88
  4. Step 4: Simplify right side
    765,003.33x = 444,334,535,740.60
  5. Step 5: Solve for x
    x = 444,334,535,740.60/765,003.33
  6. Step 6: Final answer
    x = 580,826.93

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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.