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Finding the Fourth Proportional to 323,411.60, 485,117.40 and 163,979.30

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Solution

The fourth proportional to 323,411.60, 485,117.40 and 163,979.30 is: 245,968.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,411.60 : 485,117.40 = 163,979.30 : x
  2. Step 2: Convert to fraction form
    323,411.60/485,117.40 = 163,979.30/x
  3. Step 3: Cross multiply
    323,411.60x = 485,117.40 × 163,979.30
  4. Step 4: Simplify right side
    323,411.60x = 79,549,211,669.82
  5. Step 5: Solve for x
    x = 79,549,211,669.82/323,411.60
  6. Step 6: Final answer
    x = 245,968.95

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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.