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Finding the Fourth Proportional to 485,868.96, 728,803.56 and 260,919.96

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Solution

The fourth proportional to 485,868.96, 728,803.56 and 260,919.96 is: 391,380.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,868.96 : 728,803.56 = 260,919.96 : x
  2. Step 2: Convert to fraction form
    485,868.96/728,803.56 = 260,919.96/x
  3. Step 3: Cross multiply
    485,868.96x = 728,803.56 × 260,919.96
  4. Step 4: Simplify right side
    485,868.96x = 190,159,395,723.06
  5. Step 5: Solve for x
    x = 190,159,395,723.06/485,868.96
  6. Step 6: Final answer
    x = 391,380.00

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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.