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Finding the Fourth Proportional to 323,380.88, 485,320.40 and 260,355.20

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Solution

The fourth proportional to 323,380.88, 485,320.40 and 260,355.20 is: 390,733.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,380.88 : 485,320.40 = 260,355.20 : x
  2. Step 2: Convert to fraction form
    323,380.88/485,320.40 = 260,355.20/x
  3. Step 3: Cross multiply
    323,380.88x = 485,320.40 × 260,355.20
  4. Step 4: Simplify right side
    323,380.88x = 126,355,689,806.08
  5. Step 5: Solve for x
    x = 126,355,689,806.08/323,380.88
  6. Step 6: Final answer
    x = 390,733.34

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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.