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Finding the Fourth Proportional to 485,908.12, 728,862.06 and 260,959

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Solution

The fourth proportional to 485,908.12, 728,862.06 and 260,959 is: 391,438.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,908.12 : 728,862.06 = 260,959 : x
  2. Step 2: Convert to fraction form
    485,908.12/728,862.06 = 260,959/x
  3. Step 3: Cross multiply
    485,908.12x = 728,862.06 × 260,959
  4. Step 4: Simplify right side
    485,908.12x = 190,203,114,315.54
  5. Step 5: Solve for x
    x = 190,203,114,315.54/485,908.12
  6. Step 6: Final answer
    x = 391,438.44

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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.