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Finding the Fourth Proportional to 492,209.40, 738,314.10 and 421,350.60

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Solution

The fourth proportional to 492,209.40, 738,314.10 and 421,350.60 is: 632,025.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,209.40 : 738,314.10 = 421,350.60 : x
  2. Step 2: Convert to fraction form
    492,209.40/738,314.10 = 421,350.60/x
  3. Step 3: Cross multiply
    492,209.40x = 738,314.10 × 421,350.60
  4. Step 4: Simplify right side
    492,209.40x = 311,089,089,023.46
  5. Step 5: Solve for x
    x = 311,089,089,023.46/492,209.40
  6. Step 6: Final answer
    x = 632,025.90

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Similar ratio
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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.