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Finding the Fourth Proportional to 326,030.80, 489,046.20 and 136,458.40

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Solution

The fourth proportional to 326,030.80, 489,046.20 and 136,458.40 is: 204,687.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,030.80 : 489,046.20 = 136,458.40 : x
  2. Step 2: Convert to fraction form
    326,030.80/489,046.20 = 136,458.40/x
  3. Step 3: Cross multiply
    326,030.80x = 489,046.20 × 136,458.40
  4. Step 4: Simplify right side
    326,030.80x = 66,734,461,978.08
  5. Step 5: Solve for x
    x = 66,734,461,978.08/326,030.80
  6. Step 6: Final answer
    x = 204,687.60

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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.