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Finding the Fourth Proportional to 326,436.60, 488,998.80 and 220,148.40

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Solution

The fourth proportional to 326,436.60, 488,998.80 and 220,148.40 is: 329,780.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,436.60 : 488,998.80 = 220,148.40 : x
  2. Step 2: Convert to fraction form
    326,436.60/488,998.80 = 220,148.40/x
  3. Step 3: Cross multiply
    326,436.60x = 488,998.80 × 220,148.40
  4. Step 4: Simplify right side
    326,436.60x = 107,652,303,421.92
  5. Step 5: Solve for x
    x = 107,652,303,421.92/326,436.60
  6. Step 6: Final answer
    x = 329,780.13

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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.