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Finding the Fourth Proportional to 620,018.60, 929,809.20 and 220,672.40

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Solution

The fourth proportional to 620,018.60, 929,809.20 and 220,672.40 is: 330,930.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,018.60 : 929,809.20 = 220,672.40 : x
  2. Step 2: Convert to fraction form
    620,018.60/929,809.20 = 220,672.40/x
  3. Step 3: Cross multiply
    620,018.60x = 929,809.20 × 220,672.40
  4. Step 4: Simplify right side
    620,018.60x = 205,183,227,706.08
  5. Step 5: Solve for x
    x = 205,183,227,706.08/620,018.60
  6. Step 6: Final answer
    x = 330,930.76

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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.