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Finding the Fourth Proportional to 323,418.60, 485,127.90 and 163,986.30

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Solution

The fourth proportional to 323,418.60, 485,127.90 and 163,986.30 is: 245,979.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,418.60 : 485,127.90 = 163,986.30 : x
  2. Step 2: Convert to fraction form
    323,418.60/485,127.90 = 163,986.30/x
  3. Step 3: Cross multiply
    323,418.60x = 485,127.90 × 163,986.30
  4. Step 4: Simplify right side
    323,418.60x = 79,554,329,347.77
  5. Step 5: Solve for x
    x = 79,554,329,347.77/323,418.60
  6. Step 6: Final answer
    x = 245,979.45

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1.5x scale

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.