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Finding the Fourth Proportional to 323,382.88, 485,323.40 and 260,357.20

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Solution

The fourth proportional to 323,382.88, 485,323.40 and 260,357.20 is: 390,736.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,382.88 : 485,323.40 = 260,357.20 : x
  2. Step 2: Convert to fraction form
    323,382.88/485,323.40 = 260,357.20/x
  3. Step 3: Cross multiply
    323,382.88x = 485,323.40 × 260,357.20
  4. Step 4: Simplify right side
    323,382.88x = 126,357,441,518.48
  5. Step 5: Solve for x
    x = 126,357,441,518.48/323,382.88
  6. Step 6: Final answer
    x = 390,736.34

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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.