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Finding the Fourth Proportional to 620,742.20, 931,026.90 and 200,060.60

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Solution

The fourth proportional to 620,742.20, 931,026.90 and 200,060.60 is: 300,063.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,742.20 : 931,026.90 = 200,060.60 : x
  2. Step 2: Convert to fraction form
    620,742.20/931,026.90 = 200,060.60/x
  3. Step 3: Cross multiply
    620,742.20x = 931,026.90 × 200,060.60
  4. Step 4: Simplify right side
    620,742.20x = 186,261,800,230.14
  5. Step 5: Solve for x
    x = 186,261,800,230.14/620,742.20
  6. Step 6: Final answer
    x = 300,063.05

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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.