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Finding the Fourth Proportional to 326,048.40, 489,218.40 and 115,837.20

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Solution

The fourth proportional to 326,048.40, 489,218.40 and 115,837.20 is: 173,807.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,048.40 : 489,218.40 = 115,837.20 : x
  2. Step 2: Convert to fraction form
    326,048.40/489,218.40 = 115,837.20/x
  3. Step 3: Cross multiply
    326,048.40x = 489,218.40 × 115,837.20
  4. Step 4: Simplify right side
    326,048.40x = 56,669,689,644.48
  5. Step 5: Solve for x
    x = 56,669,689,644.48/326,048.40
  6. Step 6: Final answer
    x = 173,807.60

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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.