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Finding the Fourth Proportional to 380,620.72, 570,752.33 and 220,742.11

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Solution

The fourth proportional to 380,620.72, 570,752.33 and 220,742.11 is: 331,009.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,620.72 : 570,752.33 = 220,742.11 : x
  2. Step 2: Convert to fraction form
    380,620.72/570,752.33 = 220,742.11/x
  3. Step 3: Cross multiply
    380,620.72x = 570,752.33 × 220,742.11
  4. Step 4: Simplify right side
    380,620.72x = 125,989,070,757.86
  5. Step 5: Solve for x
    x = 125,989,070,757.86/380,620.72
  6. Step 6: Final answer
    x = 331,009.50

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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.