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Finding the Fourth Proportional to 325,985.40, 488,978.10 and 220,231.80

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Solution

The fourth proportional to 325,985.40, 488,978.10 and 220,231.80 is: 330,347.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,985.40 : 488,978.10 = 220,231.80 : x
  2. Step 2: Convert to fraction form
    325,985.40/488,978.10 = 220,231.80/x
  3. Step 3: Cross multiply
    325,985.40x = 488,978.10 × 220,231.80
  4. Step 4: Simplify right side
    325,985.40x = 107,688,527,123.58
  5. Step 5: Solve for x
    x = 107,688,527,123.58/325,985.40
  6. Step 6: Final answer
    x = 330,347.70

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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.