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Finding the Fourth Proportional to 326,007.80, 489,011.70 and 219,719.60

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Solution

The fourth proportional to 326,007.80, 489,011.70 and 219,719.60 is: 329,579.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,007.80 : 489,011.70 = 219,719.60 : x
  2. Step 2: Convert to fraction form
    326,007.80/489,011.70 = 219,719.60/x
  3. Step 3: Cross multiply
    326,007.80x = 489,011.70 × 219,719.60
  4. Step 4: Simplify right side
    326,007.80x = 107,445,455,119.32
  5. Step 5: Solve for x
    x = 107,445,455,119.32/326,007.80
  6. Step 6: Final answer
    x = 329,579.40

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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.