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Finding the Fourth Proportional to 247,147.20, 370,720.80 and 220,903.20

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Solution

The fourth proportional to 247,147.20, 370,720.80 and 220,903.20 is: 331,354.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,147.20 : 370,720.80 = 220,903.20 : x
  2. Step 2: Convert to fraction form
    247,147.20/370,720.80 = 220,903.20/x
  3. Step 3: Cross multiply
    247,147.20x = 370,720.80 × 220,903.20
  4. Step 4: Simplify right side
    247,147.20x = 81,893,411,026.56
  5. Step 5: Solve for x
    x = 81,893,411,026.56/247,147.20
  6. Step 6: Final answer
    x = 331,354.80

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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.